I always wonder what people do with their email address to receive that much spam. I have a Fastmail account with a catch-all that receives all mail sent to a d

I always wonder what people do with their email address to receive that much spam. I have a Fastmail account with a catch-all that receives all mail sent to a domain, and I rarely receive spam. I'm not exactly careful spreading my email address around either. I have noticed that almost all spam I do receive is sent to an address I posted here on HN, so perhaps I just haven't posted any addresses on other sites that are crawled by spammers a lot?