That sounds plausible , except in the instance of the one I did accept and play , I specifically ask how they had come to invite me , and the reply was that I was on their friends list. But I wasn’t because when I had the invite the day before I checked out their profile and friends list and I was not on it and they were definitely not on mine . Thats why I say it’s weird !
But I appreciate your thought Scott , thank you, Lesley