The claim is that if you joined the insiders, installed Win10 Preview (10130) and upgraded to all the releases between and finally ending at 10240, you qualify for the free RTM, and can opt out of insider. No need to provide a previous install of Win7/8
MS says that you MUST have had a previous install, no matter what version of Insider Preview you started with.
Now despite all this, some users report having began with 10130, then did a fresh install of 10240 and were still marked "licensed". Their BIOS being the old kind, not uefi, so no previous key existed... then other users report, "expiration" dates or denial of activation of 10240...
So what's the final say on this? Can we, who had no previous install, who began with 10130 and ended at 10240, keep our Win10 and leave the insiders without having to provide a previous install key?