I flew LHR-LAX yesterday in Polaris upgraded with PP’s, and was invited to the VIP/GS side. It was my first time on that side. When I flew back in October, my upgrade failed. It seems from this thread that the (unofficial?) policy for 1K’s is that they are invited if flying in Polaris. I was never invited while flying in Polaris during the pre-Covid “Surprise and Delight” days.