for itaku, I couldn’t really find anything about who runs it. Their about page only refers to themselves, not even any admin or dev accounts on the site. Their roadmap and plan look decent enough, but without knowing anything about the background or philosophy its hard to know.

I think twitter is popular because of the ease of posting. Another complaint about FA is difficulty to post, especially many at once. I don’t post anything, so I can’t comment to that. As for fediverse, yes integration would be a bonus. Whether a fediverse site, or something that talks to it would have to be determined. A stand alone site has more capabilites to grow with certain features that would add value, such as an integrated escrow system for commissions, ability for subscriptions and direct payments. With the fediverse you have all the connections and integrations that are already there and should be able to integrate with them. You also have the plus and minus of dispersed moderation and communities.

In my idea, a good api would allow plugins and tools for the community to build integrations.