I have two other shops on Folksy and decided not to open Graceful Deviant there for several reasons.
Firstly, I have had a better response from Etsy (when I put the effort in mind you!) with respect to interest & sales. It takes time though which can be disheartening :( Plus, I do find a few people who have heard of Etsy - Folksy, not a clue!
Secondly, now Folksy are VAT registered, they passed the costs on to us so now it's going to cost more to list and pay in commission.
And lastly, as mentioned previously, it's got pretty nasty over there recently with changes to what they deem 'handmade' and the dodgy criteria they have applied.
So for me, I'll stick here I think :) But there are loads of alternatives out there so as Sophie says, you don't need to stick your eggs in one basket!
Ellen x