scamper

I would probably call them ‘boards’. Communities is too long of a word imo and it makes it sound like the people subscribed all have some kind of shared culture or relationship. That definitely happens in some cases (there are subreddits which have built a community around them) but it’s not universal.

One of the best games ever made, (you won’t) change my mind. Some battles are super difficult though, you really need to be strategic. I hope you have a good time!