Private trackers may have free entry but cost money in other ways. It's not easy to get buffer on a home connection. I have probably spent $200 on my seedbox over the years. Pay-per-bite sounds a lot cheaper in contrast.
In context of the US maybe it is different. Mine is 200mbit/s no caps $7/mo connection - common in Moscow - and I don’t remember caring about traffic or speed ever. Any torrents with 5+ seeds is like whoooosh and it’s done.