I only recently discovered Mastodon and tried it out. It works surprisingly well - and opens doors to interesting subcultures. I really wish this project well and hope it helps drive the trend to a more decentralized web again.
(great article!) I feel like there's a little bit missing: the federated aspect. Depending on what type of art you make, you might find you are more findable (and able to find people in the same field) if you're on another instance. Like drawn art might fare well on mastodon.art, but photography might do better on photog.social—take the time to find the right place for yourself!
This is my first time hearing of mastodon. I'll have to check it out! I noticed the suggestions there are essentially the same as what people suggest for Etsy.