It's a good idea, technically two issues for the price of one.
Too bad it looks to be retailer based, if you got an individual code from inside the issue itself which you could then redeem online without the need for the retailer to remember/have enough of the codes I think it would be a better system.
However that method would enable anyone who opened the issue to flick through it, take a photo or with the prevelance of smartphones auto scan the code online immediately and get the digital copy without purchasing the paper version.
It will be interesting to see how the trial goes.
Looking For: Wreckers Saga TPB Collection (with Requiem)