They'd get less than cashing it all out themselves obviously, but it would take forever to unravel what actually happened (if possible ever)
Many exchanges refuse to accept coins that have passed through a tumbler. If you attempt to deposit these coins, the exchange will refuse to credit you unless you provide copious amounts of documentation. Currently they do not seize your coins but will force you to withdraw them.
Some exchanges are even going through users' deposit histories and are retroactively flagging deposits from coin mixing services: https://twitter.com/kristapsk/status/1374336620158140419
This is why many criminals are moving away from Bitcoin into Monero, which has anonymized transactions and doesn't suffer from the chain analysis problem.
They'd just have to look at anyone unwise enough to use the money instead of turning it over to authorities (or abandoning the wallet).
IANAL, but if crime prescription is possible, you could transfer to 5,000 wallets and keep the rest for your pirate-themed retirement island.
Basically communities freak out when they think founder/team is selling any of the project’s tokens no matter how long its been or whether what the stated vesting conditions were
So we just bundle it in monthly distributions in multisend transactions to new addressses, some of the transactions are monthly vesting payments to marketers, some of the payments are to ourselves. Not possible to distinguish.
(This is also possible because communities also demand that issuers put funds and the tokens into liquidity pools, which is not always compatible with having a ton of other tokens just sitting in separate vesting treasuries. So liquidity pool shares are vesting and they can be sent anywhere and unbundled)
