One thing which I have been doing is mentioning the pol here and there. It has a large amount of alternative spots where /b/rother refugees went. I'm not sure how long the poll will remain up but it seems like these polls can be up for a long time. For now, it's at least been voted on and seen by 200+ anons.
http://poal.me/i8e0b3
I've noticed that almost every single time I've linked it, the votes go up. So people are looking at it, they're registering the names and data. I'm not sure how best to spread the name of /acb/ outside of the pol link but I have mentioned /acb/ a couple of times to a few on /b/.
There was a /n/ews thread that I noticed, two of them. Some people mentioned /acb/ in the threads. I mentioned the pol. Not sure exactly where to take the next step, but perhaps mentioning it every now and then could be a way to shine a light.