> It's hardly more effort than making a Facebook accountI'm not talking about the effort involved in opening an account. I'm talking about the effort involved in managing one's own instance of an app. That is not zero, and nobody, not repl.it or anyone else, can magically make it zero. But it is zero for Facebook users, because they aren't managing anything; Facebook is.
If, OTOH, your idea is that repl.it does all the managing (what happens if the server hosting the app goes down? how is the data backed up? etc., etc.), then we're back to the scaling problem: how do you scale that to a huge number of users without either not being free, or adopting the same business model that Facebook has (the avoiding of which was supposed to be the reason for doing all this in the first place)?