Purchase RP with Itunes or Google Play

Wouldn't it be a good idea to be able to buy RP with your Itunes or Google Play cards? I personally have plenty of them and don't really use them. I feel like it's such a waste, so why not put it to good use? It would be a great idea, IMO, to add the feature to be able to purchase RP via a LoL app. Also, for someone like me ( whose parents don't really allow them to use money for games) this method is pretty ideal. :)