Just look how popular jailbreaking is.
But apple never supported users unlocking their phones, and they probably never will.
I still doubt that the take-down of apps is compatible to their rights in the store, in my eyes someone needs to sue them for market manipulation.
I never said they did, but the fact that people have to even unlock them shows you how needlessly restrictive Apple is. People should just ditch them altogether. Hopefully they will overtime and their sales will reflect that, then they might reconsider the business practises.