Comment by BrunoBernardino

I've built bewCloud [1] (a simpler and modern alternative to Nextcloud and ownCloud) for me and my family and it's free because it's open source and you can host it yourself, thus not costing me much to maintain (dealing with issues and requests and emails does take a toll, though).

Because we use it (and depend on it), I am vested in making sure it works and continues to work well, and doesn't get too complex or complicated, unnecessarily.

That being said, I've made some money from donations, grants, and people paying me to manage instances for them, for example.

[1] https://bewcloud.com