Just as an aside, everything here is true of Android as well, and I think the cut was higher (or there were more intermediaries taking a bit as well): I priced an app $1.47 in 2010 so I'd get about $1 on every purchase.

True, the Google cut was also 30%, but they didn't make such a fuss about "no links to website" and stuff like that. They didn't even have a review process for a long time.