The problem with FOSSland is that it is increasingly driven by commercial interests, not by volunteers.
I don't know the last time I encountered a used (not random hobby projects) FOSS project that wasn't funded and supported by a company (with exceptions maybe only in the GNU software suite, but even then lots of authors there are making submissions using company email addresses).
I think it's totally acceptable to not make open-source contributions to those projects unless someone is paying you to.
Companies pay with money for specific features they want, just like individuals pay with their even more valuable time to add features they want.
This is fine, so long as the community decides what features they actually want to create the "menu" of unfunded objectives donors can sponsor