I think most people just want to follow famous people for celeb stuff and corporations for news etc. Mastodon is not there yet.
Personally, I just want to read tech news like an RSS feed. All my sources I followed on Twitter are not on mastodon. So far it's a no go for me and most people. I wish it was.
I've never played one of the games but have heard thousands talk about them so I wouldn't say that counts.