I used Second Life (I believe, but may have been something else) years ago (a decade ago?) because it was one of the easiest ways to put money into anonymous paypal accounts (anonymous credit cards that get accepted by paypal weren't really a thing here back then). I bought crypto, used it to buy their in game currency, then cashed out their currency to the paypal account.

You pay a few percents of fees, and it's not "the NSA will not be able to find you", but it was more than good enough for my mildly paranoid ass.