There may be others I'm not aware of. I don't know of any famous people who are currently active on the site.

I actually checked this before I made the market. He doesn't meet the criteria. I think the only people on the site who are famous enough are 

For them to be famous, they have to have a Wikipedia page with 1000+ words (body text only, not subtitles, tables, captions, etc.) or a social media account with 1m+ followers/subscribers.

It has to be proven that the person is who they say they are. Vandalizing a Wikipedia page to increase a page's word count or using bots to increase a user's follower count is invalid.

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