“Include Anti Feature Apps” in Settings > App compatibility:
There you have to add the anti-features you may accept included in Apps. For OM you have to enable these:
(But not 100% sure about this. Maybe the first circled is also enough?)
You have to enable “Unwanted Features” in F-Droid settings before it shows up.
Link to the app: https://f-droid.org/packages/app.organicmaps/
Please note that Germany has (compared to other EU members) quite strict and company-friendly protesting laws.
Such protests may be even considered as political protest (Politischer Streik) which makes them not illegal per se but could be illegal. https://www.bpb.de/themen/medien-journalismus/netzdebatte/219308/ein-bisschen-verboten-politischer-streik/
https://www.resourcespace.com/svn. Isn’t it free to self host?
Edit: Instructions seem to be here:
https://www.resourcespace.com/knowledge-base/systemadmin/install_overview
Regarding speed dreams, there is an announcement from a month ago: current status
TL;DR So they are currently switching from SVN to GIT and maybe use forgejo to host the project