Given the huge amount of PR made around the new Stars rewards program, I can report my experience. afeter i month with a challange which I reached (barely, actually the fist in over a year) the next 2 months I received unreachable challenges. Unless I am willing to risk my BR by playing above my limit.
Given that I can get the same or higher rakeback than the Pokestars baseline elsewhere, I wonder if Stars is not hurting themselves in the long run.
At least for myself, I know that I generated already significantly less rake than usual on their site. Optimizing the volume and site selection (i.e. stopping play after reaching the last reachable chest for the month and then playing TG or ACR will definitely hurt their bottom line) is the way to go.
September Rake paid: 142 Rakeback: 82 Stars made: 60
October Rake pair: 83 Rakeback: 20 Stars made: 63
FOr now I am planning to play PS only at times where ACR and TG have little volume. Only drawback is that I cannot use a HUD on TG (yet) and that it will hurt my bankroll challenge....
https://forums.pokerstrategy.com/forum/thread.php?postid=3275682#post3275682