Sounds like a load of dogs dangly bits. There is no legal way Microsoft can force developers down that route - it's anti-competitive behaviour and law courts will not stand for it. http://www.computerweekly.com/Articles/2007/01/30/221458/vista-slammed-as-anti-competitive.htm
Look at it another way, if it's going to cost money to get a product authorised on an Operating system then people will stop developing on that OS and develop on something else. Then Microsoft will be right up the creek with a nice shiney new OS and no software to run on it.
Look at it another way, if it's going to cost money to get a product authorised on an Operating system then people will stop developing on that OS and develop on something else. Then Microsoft will be right up the creek with a nice shiney new OS and no software to run on it.