Yes, exactly. The github readme has been pretty confusing, especially since the project changed names and there are still some references to the old name. But it was already usable as a runner in Lutris before launch and works much better for me than 8-26 which is pretty out of date now! I play a lot of non-Steam games.
I just manually filter them in Sync. I don’t have a concrete rule, but if someone has multiple posts at the top of my feed in different communities on more than one occasion, there’s a good chance I’ll filter them.