the first few sentences of this link, and their about page, and their services page all make it clear what they do. i am unsure of where you confusion comes from.

They host blogs and digital infrastructure for autonomous anarchist/leftist collectives and are deeply connected to global free speech movements since their founding in 2001. If you expect to see a two sentence mission statement or a product summary, you’re going to be disappointed.

They aren't?

They are very clearly providing IT support for free to anti fascist organizations.