The only tip is, be an active poster. If you start a community, you have to be the one regularly posting content until you get above like 1000 subs and others start posting consistently. If you can’t dedicate yourself to that, it won’t go anywhere
MySpace and digg still exist as well. Social media sites don’t die in the typical sense of the word, but they “die” nonetheless. More like abandoned malls than 6 feet under