If your target audience is only FOSS fans, great. Even a FOSS fans like to socialize with other people and that’s kind of important when you’re choosing a vibe/look/feel for a social network.

FOSSy vs corporate is a false dichotomy. The FOSSy “don’t you dare criticize my logo… I spent a weekend learning Gimp to make it… and yes the G stands for Gnu” aesthetic says “tech-savvy only”. It is off-putting for many, and FAR MORE EXCLUSIVE than any sane corporate design, save luxury brands. It doesn’t signify the lack of an in-club— it is an in-club.