What.cd were extreme sticklers for quality! When you applied to get in, they did a live interview on IRC to test your knowledge of ripping, transcoding, and different kinds of compression, how torrents and private trackers work, and their code of conduct. I remember studying for it. They also had ways to make sure you weren't cheating like checking your screen, as well as very aggressive automated checks for VPNs and blocklisted IPs to prevent ban evasion and multiple accounts.

They also had good incentive structures for keeping the bar high -- you could get kicked out for having a bad ratio, so the easiest way to pump your upload up was to fulfil obscure requests for FLACs you could purchase online but were extremely difficult to purchase (if you're lucky it's just an unknown artist on Bandcamp). I discovered a lot of obscure music this way, some that I'm still looking for to this day after it shut down.

Because I cared so much about being part of that private tracker, this is what also prompted me to rent a seedbox for the first time. I paid in Bitcoin out of paranoia (I lived in Germany where the fines for piracy are HEFTY, and they actually do come after you) back when Bitcoin wasn't really worth that much, and later found that that old wallet suddenly had a couple thousand in it instead of the spare change I couldn't move!