Is the membership idea good or bad? It depends.
If LRG allocates the same amount of copies (or more) as the number of memberships, then that means each subscriber has the opportunity to nab a release early, but the member can ignore the release entirely if desired. This means, for members, there is no longer a mad dash to the finish line.
If, however, the number of memberships exceeds the number of copies allocated for pre-release, then there the chance that some people are left behind. This will create another mad dash to the finish line. So, then you potentially have two tiers where people are clamoring for a release (pre-release and the "normal" sell times). Yes, having more chances increases the likelihood of getting the game you want, but I am sure there would be gnashing of teeth when people who paid $30 are not able to get the game(s) they want during pre-release. So, does LRG up the cost and have separate Premium and Standard memberships tiers? How many iterations will they need to go through?
I think that it is a fair point that this helps make scalping even easier. They have to decide if they can make back the $30, of course, and I am sure more than a few will be up to the challenge.
Personally, I do not think this is a good solution, but it really depends on how LRG would execute it. I do agree that it would be nice to help LRG's most dedicated fans, but I am not sure how to separate the fans from the scalpers.