Donating to an opensource project when you download it

Apparently I’ve always thought that donating to opensource software that you use would be a good idea — I found this about Firefox add-ons. I suggested that the MariaDB Foundation do this for downloads to the MariaDB Server, and it looks like most people seem to think that it is an OK thing to do.

I see it being done with Ubuntu, LibreOffice, and more recently: elementary OS. The reasoning seems sound, though there was some controversy before they changed the language of the post. Though I’m not sure that I’d force the $0 figure. 

For something like MariaDB Server, this is mostly going to probably hit Microsoft Windows users; Linux users have repositories configured or use it from their distribution of choice!