Bad deal. The asking rate on Bitmit is a lot cheaper (like .15 BTC) but you can probably bargain down. They are kind of worthless.
First of all, those are auctions..Secondly, those are invitations not accounts. There is a difference. All these accounts were created with unique IPs. I learned the hard way when I bought 50 invites and made all the accounts on the same computer. They all got banned in one sweep.
And worthless huh? When I was in the torrent game each account would make me around $200 so I'd hardly say worthless (now I stick to SEO). You would say that yes, because you have no idea what they are used for. And no..they are not used for simply sharing your files to make people happy...