Well when I got the notice in June I read it is free for one year. I guess I’ll find out
Source: http://blogs.windows.com/bloggingwindows/2015/01/21/the-next-generation-of-windows-windows-10/
I heard Microsoft representatives mention they are moving to a servicing model for Windows 10, does that mean Windows 10 is going to require a subscription?
No, Windows 10 remains a perpetual license, which means, you can upgrade to Windows 10 and use it forever without it expiring or going into any reduced functional mode.