It will be interesting to see what happens when larger commercial services like Tumblr and Flickr enter this space. There's a good opportunity for startups to e

It will be interesting to see what happens when larger commercial services like Tumblr and Flickr enter this space. There's a good opportunity for startups to experiment with social apps and sites that would have previously struggled to build a large enough network to be useful; support ActivityPub and you have a network.