This question may sound really stupid, but it's actually legit.
As the web has gotten more spam-proof over the years (CAPTCHAs, spam filters, search engine algorithms, etc.), there's not much room left for spammers to spam without worry that their content will be deleted. That's why I created a website where users are encouraged to post spam, promote spam links, advertise spam websites, and comment on other users' spam.
The only problem is, if my website is supposed to be spammy, how am I going to rank well on search engines?
To clarify, this website is intentionally filled with spam. It is literally a spam city. This is not about backlinks from spam sites or deleting user-generated spam content.