I use my "normal" email address to post to a very small number of mailing lists. Even though they're all publicly accessible lists, I get in total about 5 spam

I use my "normal" email address to post to a very small number of mailing lists. Even though they're all publicly accessible lists, I get in total about 5 spam emails a day - this is with zero spam filtering (not even SpamAssassin) on my own Postfix instance. For the past ~6 years, every time I sign up to a new web service (or even in person paper signup), I generate a new 64 hex email prefix. This allows me to know who either a) sold my address or b) got their database hacked. So far, the only website I know of who either got hacked or sold my address was: coinmama.com