Re: the cost of all their services will be drastically reduced?
> I thought that in fact most of the running copies of Win10 where given away free.
No. Not even close.
About 250million PCs and laptops are sold every year with the majority being forced by Microsoft to have Windows 10 on them. These are not free, the price of W10 is part of the computer price and this is passed to MS. These new PCs and laptops are the bulk of the 'running copies of Win10'.