I have sent emails to my contact there (they were actually in the process of placing a wholesale order with me...) and I copied my management contacts of bands that I have woked with, who's posters are on the site.
I am with Graham, I think this is coming from the GP books. They are either scanning and reselling, or the publisher cut a deal that they were not entitled to do.
They will of course be taking them down (soon, I imagine), but the larger issue is the money these posters may have generated, and who deserves to have it.
They bought a few copies of that book, and are selling the pages, framed, to test the market to see if people who shop on the site would be interested in gigposters. I do sort of believe them, because they approached me a month ago and we were just days away from finalizing wholesale order with me for gigposters and art prints.
I told them I highly recommend them taking them all down immediately and contacting the artists directly to work out Purchase Orders, like they did to me.
Um wow. Ganked here too. It's definitely my Belle & Sebastian poster from the book.
This is very unsettling. Especially since I am working on a deal with them currently as well. Ugh.
At first I thought maybe this was through licensing with Chronicle or even Clay, but if they are basically selling pages like that Ebay goof, this is super not OK. No attributions for the artists, no clearances from the artists OR the bands. It's not going to sit well with anyone.