Many airdrops are decided by a snapshot: a record of which wallets held tokens or used a protocol at a specific block or moment in time. Snapshots are powerful because they reward past behaviour rather than whoever shouts loudest after an announcement — but they are also widely misunderstood. Understanding how snapshots work explains why some active users qualify and some do not, and why trying to game a snapshot after it is announced is usually already too late.

A snapshot captures the state of the chain at one moment: balances, holdings, or interaction history up to that block. Projects then apply their criteria to that frozen record — for example, wallets holding a minimum amount, wallets that completed certain actions, or wallets active during a qualifying period. Because the record is on-chain, it is verifiable: anyone can check the data at that block, which is part of why snapshots are trusted as a fair distribution method compared with sign-up forms or manual lists.

Projects often announce a snapshot only after it has been taken, precisely to prevent last-minute gaming. If everyone knew the snapshot date in advance, wallets would pile in for a day, qualify, and leave — rewarding mercenaries rather than genuine users. This is why retroactive airdrops feel surprising: the qualifying behaviour happened months before the announcement. The practical lesson is that consistent, genuine use of protocols you value is the only reliable way to be in a snapshot, since you cannot time what you cannot predict.

Wallets miss snapshots for ordinary reasons: funds held on an exchange rather than in a self-custody wallet at snapshot time, tokens moved just before the snapshot block, activity below a minimum threshold, or interaction through a contract the project did not count. Some projects also exclude wallets flagged for Sybil behaviour or require a later claim step that unclaimed allocations expire from. Reading the project's eligibility post carefully, when it appears, tells you which of these applied — and what to do differently next time.

You cannot guarantee a future snapshot, but you can position yourself sensibly: hold assets you believe in in your own wallet rather than only on exchanges, use protocols you genuinely like over time rather than in bursts, and keep a private record of your activity so you can check eligibility when announcements appear. Ignore anyone selling snapshot dates or guaranteed qualification lists — if the date were public and reliable, the project would have announced it itself. Genuine, sustained participation is the only strategy snapshots consistently reward.

Snapshot-based rewards can create record-keeping obligations, since receiving tokens may count as income in some jurisdictions and later sales may count separately. Keep a simple log of airdrops you receive: the project, the date, the token amount, and its approximate value on receipt. This takes a minute per drop and saves a painful reconstruction if you ever need the figures. You do not need to be a tax expert to keep good records — you only need notes detailed enough that an expert could work from them later. Good records are part of what separates a hobby from a well-managed activity.

Airdrop snapshots reward the past, not the present: they freeze a moment of real activity and distribute to the wallets that were there. That is why they are announced after the fact, why exchange-held funds often miss out, and why steady genuine use beats last-minute farming. Use protocols you value, keep your own records, and let snapshots take care of themselves.