The small subs matter a lot. Same principal as grocery stores, everyone carries the most popular products but the large variety of storm moving products keeps people coming to a specific store. Likewise any old website can have your basic selection of memes news politics Etc but the smaller communities are what make the place unique. We're basically at the point where for a lot of people those Basics are already met so Reddit having problems with their smaller subreddits means I'll be less to keep people around. Once those communities all make their way over here then there'll be nothing but generic slop. An audience of normies scrolling past slop can just vanish in an instant