@hj the nice thing about ActivityPub federation is that it's not a competition. Everybody benefits in practice. For example, Pixelfed doesn't support following people across instances at the moment, but I follow friends on other instances via Mastodon.
So, Pixelfed directly benefits from the larger Mastodon community and the features Mastodon already implements.
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!