Yes, I could find some references.
And I better understand Rysky's points actually.
I think Paizo steers quite clear of anything that is not clearly legal.
So, when I subscribe to receiving Pathfinder RPG line products, which does not specify any edition IIRC, I think I cannot really claim that when I receive these products that they were unsolicited even if they are from the new edition of Pathfinder RPG.
This might be a good point if PF2 were a modestly different game to PF. Since it's connection to PF is extremely tenuous it's essentially saying you subscribed for PF content but we're going to send you expansions for Shadowrun but with Pathfinder on the cover. PF2 is incompatible content for the subscription's spirit.