Mullvad seems to come out pretty clean whenever these shady VPN providers show up on the news again. Being able to use them by just transferring some crypto to the right address without even needing to enter a username or email address seems pretty good. If you ever forget your account number, you're out of a month's worth of service at most and can just generate a new account when needed. It's the only commercial VPN I put a moderate amount of trust in, even though I've never used their service.