However, 'Reclaim the Streets' never asked anyone for any donations. That made them very different to your typical 'save the world' group where the main point of the org/charity is just that, soliciting donations.
Like many people here I don't quite get what the money is needed for, even though it is spelled out. I also had a look at the github and it looks like things are aeons away from the 'Wordpress 5 minute install'. The Wordpress 5 minute install really is too much technical wizardry for a lot of folk, they need an 'I.T. Expert' (TM) to do it for them. Wordpress offer hosted versions to get around this trifle and I am sure that is the way to go, however, if you are open sourcing the code and expecting people to host their own, being open source is not enough, it has to be reasonably easy to install.
Every man, dog and cat rolls a few Rails apps before their breakfast in The Valley, so it is no big deal. Yet for the people that are just about okay uploading something like Wordpress to their 'FTP server' and setting up a database through some hideous 'cPanel' contraption do matter. These are the people likely to be administrators of a group somewhere that could benefit from your software.