Mastodon provides the highest (over 12%) engagement under posts
The methodology is "(likes + shares + comments)/followers", and the two platforms that allegedly provide the highest engagement are the ones with an order of magnitude fewer followers.A more likely explanation is that fewer followers means higher engagement, which totally makes sense; for a larger social network account with 100k+ followers, many of those will be bots and people who follow anyone and everyone without really caring. A smaller account will only have followers who care.I don't think there's anything specific about Mastodon here other than it being a smaller social network so you naturally have far fewer followers.In either case, this is a single account talking about a single post, and shouldn't be used to generalize different levels of engagement across social networks.