My registration woes have subsided after seeing "Useless Account". It seems +5,400 users have no problem creating an account for the sake of simply creating an account. That's right, "Useless Account" is pointless... All you do is create an account and modify it. It's obviously a hoax website, and pretty funny at that (given the number of people who actually signed up).
When I think of Wantsy, the registration process is really simple; an e-mail address and password. That's it... It can even be a part of the listing process, so it's not a big deal. On the seller side, if you see someone that wants your item, why wouldn't you create an account?