GTR2, like GT-Legends, is a title becoming known as "old and dying" (wrongly IMHO, there's still so much win in it!), so its 'health' also depends on unity between communities, whatever their size, popularity or nationality.
Personally, I take it that they think we're stealing, with P&G, content and users from GT-Legends? (
They're the only site I've heard so far having a 'grip' (pun intended) with P&G and it's hard for me to find other reason(s). Not sure I am alone with this though. (feel free to correct me if I'm wrong, please)
...IF it is that, instead they should take a good look and testify the ammount of work that has been made through the years in Power&Glory.
Most of all, to understand the concept and purposes of this project.
In the end, it's their own choice, to which they are entitled - they own and run the place afterall. We obviously will have to respect that, even if we can't understand why did they decide so.