Because Office is not the same as every other 99c fart app on the App store.
The Office app needs special rules because you and MS say it's special. Yeah, that's not a reason. So all the subscription based apps like the WSJ app can do whatever they want because they are special too?.
Which app on the iPad among the million apps following the "rules" is going get more business sales in companies for the iPad apart from Office?
Funny how you defined "business sales" because if you want to talk millions in sales to consumers you have to ignore Pandora, Kindle, Wall Street Journal, New York Times, etc.
Thus, MS is in a way stronger negotiating position than the developer of a fart sounds app. If you can't understand that simple logic, I have nothing more to say to you.
Lets say Apple demanded 100% instead of 30%, does this mean it's all MS's fault? Who is to say 30% is the "right" amount? You, the MS hater?
If you went to any business in this world and you wanted them to make exceptions for you, you would say it's partially their fault if they say no? What kind of warped sense of entitlement do you have? Can you say to a potential landlord that you want to pay less rent than he's offering and then blame him because he didn't say yes? That the landlord is partially to blame that you were without an apartment.
If I were renting a thousand apartments, yes I would ask the landlord for a discount. That is not a warped sense of entitlement, it's getting a good deal for your company. If you didn't, and paid one of your biggest rival companies extra money you didn't need to, you would be called an unknowing fool and would be fired from any half decent company for wasting money like an idiot. You fail at Negotiating 101. Good that you aren't responsible for big companies' business decisions.
You want to see how Apple might bend rules? Look at this email where an Apple exec was proposing an exception to Amazon books. http://news.cnet.com/8301-13579_3-57589185-37/apples-eddy-cue-yep-we-caused-e-book-pricing-to-rise/
I honestly can't make out if you're that dense, or your abject MS hate is clouding your logic. I hope it's the latter. And Slashdot moderation shows how it's more about MS hate than insightful comments, no wonder the site is dying as people flee from theirrational hating circlejerk.