I've just received that offer too, Covergirl, and will be paying the £114 required on the 1st of October. From the company's point of view, I can see this should help to retain subscribers full term, but in the current economic climate it is a generous offer. Hopefully more may come in due course. TC.
How to get Windows 10 now: how to download and install Windows 10 even if GWX.exe is missing