I don't want to be a Raiborg and be a douche about this, but I have some bad news to report about a gamesharing member. Unfortunately, it seems as if Deidara may be gaining review codes from developers, and selling them for a profit. While there's nothing in the rules of the site that say this is something that can't be done, it's a very big no-no. Devs send out review codes in an attempt to generate buzz for their game, not so some shady person can make a few bucks. This may no have anything to do with gamesharing, but we're talking about a member's character and ethics here, which are very important in a community that requires trust in its members.
If you're curious, you can read more here:
http://dan-adelman.com/post/114584204446/my-very-first-experience-with-a-scammer
The article details how this came to be, as well as the evidence against Deidara.
Edit: In addition to the above, it would appear that Deidara is now deleting all posts that reference him selling these codes. There are several posts that were quoted by other members of this site, but trying to find that post turns up no results.