I'm not an expert on marketing by any means so take it with a grain of salt but my impression is that testimonials are more effective when you tell about your personal experience instead of just saying "x is y". So if you could say what Mastodon enabled you to do or what it means to you that would be a lot better than if you just said that Mastodon has something.
@Gargron I'm personally addicted to Mastodon, for me it's like if Facebook or Twitter had a friendly version— where I can discuss things with people around the world about every single thing they love. If there's a subreddit for everything, of course there's also a Mastodon instance for everything: I've got one profile for sharing art, another one for casual conversation and another one for politics.
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!