[intothemild]

You can do this.. but you cannot say "we charge you 30% more here, but if you signup over there, it's regular price"

Apple saying "it's giving the users more options" is total BS.. it's all about getting their 30%, because if you play by their rules, and give the customer more knowledge that you're being forced to charge extra because of this payment option.. then Oh noes.

A great example outside the app store is some credit cards charge much more than the others, so some stores charge you that on top. "You want to use X card, sorry but there's a surcharge for that card.. you could use something else.