Most successful projects in FOSS with many downloads get virtually no contributions or financial support back. Even the largest ones have an enormous user to contributor ratio with almost all benefits going to the users. Therefore, it's the status quo for open-source in general. Those getting tons of contributions and development without a company behind them are extremely rare.

I had a great article on this before my crashed HD deleted newer bookmarks. It was a woman that surveyed many popular projects to ask about their status. Most complained they were barely getting by, the developer(s) stretched thin, tons of requests without accompanying payment/support, and mostly no contributors. I'd like a link to that article if any readers know which one I'm talking about.