To turn off free upgrade to windows 10, is a silly move by Microsoft?

Microsoft is going to turn off free upgrade to Windows 10 on July 29. About a year ago Microsoft launched Windows 10 and they announced that all the users who are using Windows, will be able to upgrade their windows 7, 8 or 8.1 to windows 10 for free.

As I know 19.14% of all the computer users have upgraded their operating system to Windows 10, so as Microsoft claimed that Windows 10 is the fastest growing Windows, they have ever launched.

But I don't know, I think they have forgotten that there is a reason why Windows 10 is the fastest growing version of Windows. If you are going to ask Microsoft what is the reason of growing windows 10, then they will reply that Windows 10 is the most advance Operating System, it's more customizable and faster than windows 8.1, which was the last version of windows. If this is the reason of the growth of windows 10 then I would like to ask Microsoft that Windows 8.1 was faster, more customizable and more advance than windows 7 then why are 49.05% of all the PC users still using windows 7?

It is not a genuine answer for a Windows fan boy. Undoubtedly Windows is growing very fast because of its free upgrade and they are going to turn off free upgrade on July 29, and I remember that in a Microsoft event they were saying, "We want to upgrade 1 billion PCs to windows 10'. If they will turn off free upgrade to windows 10 then how can they reach to their 1 billion goal? It seems to me impossible if they will turn off free upgrade.

What you think folks, let us know in comments below.