I know from 1st hand personal experience that you don't have to "Deposit" on these sites to be able to cash-out on these following sites, as I never did.
-Never deposited and cashed out for a-lot (Even though It's slow, the funds do get to you).
ACR-Have also cashed out, but It works differently from what I can tell, because of the "Restrictions/Limits" that the site places, I mean It's a "Minimum" that you must have In-order to be able to cash-out via certain ways, so for me, the smallest of "Cash-out" Methods, I seen on that site was the "Bank method" so to qualify for that method, you need to "Deposit" the min and have cashed out more than I "Deposited".
Poker-Stars, you don't need to "Deposit" to cash-out, yet again, since "Poker-Stars, doesn't offer any real good free-rolls, It would take you a long time to actually have enough built up to be able to cash-out In the first place", unless you plan on only playing "Private Free-rolls" and working It up that way?
I don't know about "Unibet" or "888", so I can't help you their.
Party-Poker, Really on that site, you do need to "Deposit" because you can't play any game on their without "Depositing In the first place". Yet If you do "End up running to say 10k from a small min Deposit", than basically "You're able to with-drawl no Issues" (Even though) the cash-outs take like 3-5 days to get to you.
Iron-Poker (Yet again), If you don't "Deposit" than you'll be missing out on the 1k CC game that's monthly and you really don't want to do that. Also you only need to deposit the min to be eligible to play In the 1k CC game and than If you do win you'll be able to cash-out no Issues back to your bank account, and the funds are In the account 2-3 days tops.