I think as long as the right apps utilize the subscription service, it'll be fine. Apps that were always already a subscription make sense. But even then, how does one go about a free trial for an app that needs payment for a subscription upfront? Don't in-app purchases seem like a better method in the long run? I'm not going to pay $5 for an app that I won't use past the first week--if at all. Although, if they are able to work out subscription payments, maybe they can work out a way to do a designated trial period, with a deadline for cancellation?