Discussion based on assumptions built on rumours isn't going anywhere
.
What is clear is that PC/IHG owns the game and can do whatever it chooses with the structure and rules. Fairness may be something they aim for, but it's likely not their guiding light.....
The other thing to remember is that Ambassador and the rest of the PC programme are quite separate.
Ambassador grades of membership are mostly useless for those who don't stay more than a few times a year at ICs.
And by that same token, PC/IHG are likely more concerned with IC stays when handing out RA. I don't really understand why they should give a hoot about stays at Holiday Inns etc: they have the Spire business to take care of that.