Expert VerifiedHow Public Token Sales Work: Auctions, Allocation and Vesting
- Last Updated: 26 Aug 2026
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How Public Token Sales Work: Formats, Allocation and Vesting
Written by Marcus Chen, Research Fellow. Reviewed by Dr. Sarah Mitchell, Blockchain Security Analyst. Updated August 26, 2026.
Public token sales look simple from the outside, but the details of format, allocation and vesting decide almost everything about what a participant actually receives. This guide explains how those pieces work in general terms, using MegaETH's structure as a concrete point of reference. The aim is to help you read any sale's rules clearly, not to suggest joining one.
What is a public token sale and how does it work?
A public token sale is a distribution event where a project sells part of its token supply to the general public under a published set of rules. Those rules define the price mechanism, how much supply is available, who is eligible, and when the tokens actually become usable.
The mechanics fall into a few moving parts. A project sets aside a share of supply, chooses how the price will be set, opens the sale for a defined period, and then distributes tokens to successful participants. Delivery is often tied to a token generation event, and the tokens may unlock immediately or over time depending on the schedule.
Because every one of those choices is made by the project, no two sales are identical. Reading the specific rules is the only way to understand a given sale, and the sections below break down the choices that matter most: format, allocation and vesting.
How do auction and fixed-price sales differ?
The core difference is who sets the price. In a fixed-price sale the project states a price in advance and sells until the allocation runs out. In an auction, demand from participants helps determine where the sale settles, so the final terms are not known with certainty at the moment you commit.
Fixed-price sales are straightforward to understand, since the number is published up front, but they can sell out quickly and reward speed over consideration. Auctions spread price discovery across a window and let demand play a role, which MegaETH used in its SONAR event, a 72-hour English-style auction offering 5% of supply. The trade-off is added uncertainty about the final outcome.
Neither format is inherently better. Each distributes tokens differently and suits different goals, and the right question for a participant is not which format is superior but how a specific format's rules affect the price and allocation they can expect.
How is allocation decided when a sale is oversubscribed?
When demand exceeds the supply on offer, the sale is oversubscribed, and the project's allocation rules decide who gets how much. Common approaches include pro-rata scaling, per-wallet caps, or an auction settlement, and the published terms are what determine the method actually used.
Oversubscription is common for high-profile sales. MegaETH's SONAR auction reportedly drew more than 50,000 bidders and roughly $1.39 billion in committed capital against a 5% supply share, which is a clear picture of demand outstripping a fixed pool. In such cases, the allocation and any refund rules become the most important fine print to read.
The practical lesson is that a large committed total does not mean each participant received what they pledged. Caps, scaling and refunds can all reduce a final allocation, so the terms governing an oversubscribed sale deserve as much attention as the headline figures that describe its size.
What are vesting and lockups, and why do they matter?
Vesting is a schedule that releases tokens over time rather than all at once, and a lockup is a period during which tokens cannot be moved. Together they control when a participant can actually use or transfer what they received, which is a central part of any sale's real terms.
These schedules exist to manage how supply reaches the market. A cliff might hold all tokens for an initial period, after which they release gradually over months. The exact shape varies by project and often differs between public participants, team allocations and investors, which is why a project's overall tokenomics context matters when reading a single sale.
For a participant, vesting changes the meaning of a purchase. Tokens that unlock slowly cannot be treated as immediately liquid, and a schedule affects when supply enters circulation. It is important to be clear that vesting governs timing only. It is not a promise about value, and nothing about a lockup should be read as a forecast of price.
How to read a public sale's terms before joining: step by step
You read a sale's terms by identifying its format, finding the supply share, mapping the vesting schedule, and checking the allocation rules before weighing it against your own limits. The steps below make that a repeatable routine.
Step 1: Identify the sale format
Determine whether the sale is an auction or a fixed-price offering, because the format decides how your price and allocation are set. This single fact shapes how you interpret every other term in the document.
Step 2: Find the supply share on offer
Locate the percentage of total supply being sold, as SONAR offered 5%, so you can judge the size of the pool against the full token base. A small share sold into large demand behaves very differently from a large one.
Step 3: Map the vesting and unlock schedule
Check whether tokens release immediately or over a cliff and vesting period. This controls when you can actually move what you receive, and it is easy to overlook in the excitement of a sale.
Step 4: Check allocation and refund rules
Read how allocation is handled if demand exceeds supply and what happens to any unfilled portion of your commitment. Oversubscribed sales often scale allocations down or return part of the funds.
Step 5: Weigh the terms against your own risk
Compare the full set of terms with your personal limits and decide independently. Commit only what you can afford to lose, and never let the size of a crowd stand in for your own judgment.
Sale formats compared at a glance
The table below summarizes how the two main public-sale formats differ across the features that matter most to a participant.
| Feature | Fixed-price sale | Auction sale |
|---|---|---|
| Who sets the price | The project, in advance | Demand within the sale window |
| Certainty at commit time | Price is known up front | Final terms depend on bidding |
| Typical pace | Can sell out quickly | Runs across a set period |
| MegaETH example | Not the SONAR format | SONAR, a 72-hour English-style auction |
A comparison like this is a starting point, not a verdict. The specifics for any given sale live in its own documentation, and two auctions can behave quite differently depending on their settlement and allocation rules.
Frequently asked questions
Do public token sales always require identity checks?
Not always, but many public sales require some form of identity or eligibility check depending on the project and its jurisdiction. The only reliable way to know is to read the specific sale's rules, since requirements differ widely and can change from one round to another.
What is a token generation event, and how does it relate to a sale?
A token generation event, or TGE, is the point at which a token is created and distribution begins. For MegaETH it occurred on April 30, 2026. A public sale often precedes the TGE, with the tokens purchased delivered at or after that event according to the vesting schedule.
Can a sale be public but still have a private round beforehand?
Yes. Many projects run private or smaller rounds before or alongside a public sale, each with its own terms. MegaETH, for example, had a large public SONAR auction and a separate smaller Echo round, so it is worth checking the terms of each round independently.
Does a lockup guarantee a token's price will hold?
No. Vesting and lockups control the timing of when tokens can move, not their value. A schedule can influence how supply reaches the market, but it offers no guarantee about price, and this guide makes no forecast about how any token will perform.