We have registered and have the stall pretty much ready to go.
No idea about how the stalls go for business but we have had our best month ever (some of it is linked) and that's before the stall goes live in Sept.
Its £5 to register - at the minute there are 83 new stalls registered for this event.
It takes time and work. Time to upload the photos (always a pain) and then you connect with a team which is allocated and you are responsible for promoting the teams items as they will promote yours on your social media (blogs, facebook, twitter, pinterest, wanelo and stumbleupon etc).
It certainly expands your reach. You get to know sellers and vitally, they get to know you.
First few days and we got free publicity as the cover photo on facebook - worth the £5 alone!
So, you will find a group of (predominantly women - though I'm working on that) who are really passionate, committed and devoted to promotion. Hard to beat.
Give your-self time to it, as otherwise it may be a waste of the cash. But a great way to establish yourself.