There are some big misconceptions about FOSS software here. F-Droid is FOSS, this means that the source code for both the client and server are available, can be copied, modified, and used by anyone for any purpose.

This does not mean that f-droid.org and the official f-droid android app — a particular installation and distribution of the software has to do… well anything really outside of complying with the license terms [1]. That’s kinda the point. They’re not obligated to host any content they don’t want for any reason no matter how inconsistent, they’re allowed to build or not build additional features as they see fit, and provide or refuse service to anyone — at least as far as the license is concerned.

Absolutely no software freedoms were violated by fdroid.

[1] And even then since they’re also the copyright holders they technically don’t even have to do that.