I read just fine thank you, doesn’t change anything, countless others are asking the same question, and MS has said more info will be released later.
Windows 10 is available as a free upgrade for qualified Windows 7 and Windows 8.1 devices. If you take advantage of the free upgrade offer to get Windows 10 and subsequently wish to clean re-install Windows 10 - it will be possible to do so AFTER upgrading to Windows 10 - without having to purchase Windows 10 or having to go back to the prior version of Windows that you upgraded from.
I get a different answer than what you are saying
swamptone is on the same page as me