I'm not saying Canonical should follow Apples model. I'm saying that the current sort of in-between-ness of the business path Canonical is following fits what they are doing now about as well as my high school prom tux fits me now.
"A fifty-fifty split may be fair, but I don't see how Canonical is entitled to the majority share here. Hell, even Apple "only" asks for 30% of subscription fees, etc., on its platform."
Platform gatekeepers can be overly aggressive in the revenue sharing mandates. The mark of a well executable platform taxation strategy is to reign in the impulse to punitively tax external developers. A 75% revenue grab is simply untenable. And if Canonical wants this sort of revenue cut from potential end-user focused ISV's they won't be seeing a huge uptake in their re-invented partner repository centered on the software store. This sort of steep revenue sharing will most assuredly kill sustained interest from people like game developers who might be interested in reaching Ubuntu users via for-pay placement in the software center.