Not really, because Apple still takes a 30% cut if you buy the subscription as an in-app purchase. This is more about getting a constant stream of money ($10/month) rather than a one-time (or every two or three years) payment of $50 or whatever.
Let's just take a look at this deal. I just bought a 356 subscription and according to the in-app purchasing wizard in the Office 365 suite on my iPad the subscription is $156 per annum. For that you are getting:
- Word, Excel, Powerpoint and change.
- License to install on up to 5 PCs/Macs
- Use on mobile devices.
- 20 GB of additional OneDrive storage.
- Skype world minutes (60 of them per mensem)
Which sounds like a pretty OK deal to me considering the volume of product I'm getting. As far as I can tell there are no temporal usage restrictions on the PC/Mac licenses in this this sub, according to the office 365 community forums multiple users can log into the same account and edit the same document. If that is true than this subscription will cover my office needs, my parents's, my sister's and her husband's and we can split the costs. As for corporate profits.... If Apple is taking 30% then Microsoft is getting $109,8 / 12 = $9,15 per month and they still have to deduct costs and taxes. Mind you, being a corporation, MS, like Apple, Google, IBM and the rest of that ilk probably enjoy considerably lower tax rates than what Joe Six-pack has to contend with. However, MS does have to pay developers, maintain their cloud service data-centers and pay the system administrators of their cloud service department out of that and pay for marketing and other such crap. I'm sure MS makes tons of money off of this stuff but it's not like the profit meter at Microsoft HQ goes Chi-chinggggg! and increments by $9,15 every time they sell an office subscription to an iPad followed by a spontaneous chorus of manic laughter from every MS manager in the known universe over how they are ripping off their customers.