Uh, guys? Scummy business practices aside, there's a pretty obvious reason why this wouldn't work: the ceiling spike. I mean, the reason Mario games work is because the platforms are designed for jumps of a specific height. Increase jump height and the game would be damn near unplayable because of things like flying enemies and stalactites.
I mean, if you're going to corrupt your standards and sell a feature of the game, don't have it be [i/]that[/i] feature. Maybe sell extra time for levels, or playable characters, or I don't know, a floating ability or something (exclusive to Princess Peach). If you're going to throw in microtransactions, at least have the decency to do them some what better than that. This is shameful.