There are many different Etsy Teams (often called "Street Teams" because they were started with the idea of getting local Etsians together), the list is here: http://team.etsy.com/teams.html
Being on a Team can be great fun. It gives you the opportunity to connect with other Etsians who share your interests and join in common goals to promote your particular art, craft or location.
So if you're a "buyer-only", consider getting more involved and join a Team. Etsy Patrons encourages buyers to join (we are here: http://team.etsy.com/viewteam.php?id=332 ), and if the discussion above is any indication, many other Teams would as well. Hopefully Etsy will soon mark the Teams on the Teams Profile page to indicate which accepts "buyers-only", but in the meantime if you see one that interests you, send a convo to the Team leader. Chances are, they'd love to have you!