Are you worried that the last users will simply not be paid due to a lack of funds?
There's a way to tell that apart from a slow queue without guessing, and the wording quoted upthread is the tell.
A venue doing an orderly wind-down constrains timing — batches, extra compliance checks, slower processing. What you're owed isn't in question, only when it lands. AscendEX said they can't assure timing or amounts. Timing you can promise to fix later; amounts you only hedge on if you're not certain what's actually there to pay out. That single word is doing a lot of work in that notice, and it's why I'd keep AscendEX in a different bucket from the other two even though all three landed in the same month.
Competitiveness explains BitMEX and BitMart fine. It doesn't explain a manual-review queue with no commitment on amounts.
On the 11 USDT flat fee mentioned above — I haven't confirmed that number myself, so treat it as unverified, but if it's right the effect is worth spelling out: below a certain balance withdrawing costs more than it returns, and "not worth withdrawing" turns into "abandoned" without anyone deciding anything. Same shape as the $50/month BitMEX charges on leftover accounts after the 23 September cutoff. Anyone still holding there should check their balance against the fee now rather than relying on that January 2027 date.