Today in the "blue bird has been drinking again" news is a policy change that prohibits advertising competing social networks.
I was curious about fediverse already, but this too much of a bait to pass on. So now I have this nice little instance of microblog.pub (technically not Mastodon, and so not against the policy), in addition to my main blog. I'm not entirely sure how will my activity will be distributed across all those places, time will tell.