They might experiment with ads and subscription tiers, but the real focus is always on getting users. Look at YouTube, AFAIK, it’s still not profitable (or if it is, it’s barely profitable), and not for lack of trying over the past few years. Yeah, sites like Reddit and Twitter are cheaper to run, but there’s still a ton of overhead and ads aren’t as profitable there.
Now investors want to see a return, and it’s just not happening.