What happens if you merge the user base of a small network and a huge network? https://en.m.wikipedia.org/wiki/Network_effect Will the small network gain from the huge one or the other way round? Also there is a lot to gain. The users base of the fediverse and it’s infrastructure grew by 5x in the last two years: https://fedidb.org/ Meta has a big interest in extinguishing a competitor before it profits from the bandwagon effect.

PDFs can contain a vast amount of different Image information, but often a good software that can edit vector data opens PDFs for editing easily. It might convert not embedded Fonts in paths and rasterize some transparency effects though. So Inkscape might work.