I think it's a great idea, although obviously it would be better if Apple just stepped up themselves (saw rumors that was likely / in progress). But as I noted

I think it's a great idea, although obviously it would be better if Apple just stepped up themselves (saw rumors that was likely / in progress). But as I noted in the comments on RWW they're going beyond in-app purchases and targeting at least one company that's got no in-app purchases and is doing the pretty standard free/paid combo.