Any points acquired through fraudulent means or gaming tactics violate the program's rules. This includes but is not limited to:
Actions that circumvent meaningful engagement with program content.
Behaviors that exploit program features to earn points in a manner inconsistent with intended use.
Any methods used to manipulate point accrual or activity tracking.
That qualifies as a gaming tactic if you earn points on the quizzes too fast (even though they are the same quizzes every month).
Overall, AARP Rewards has gone downhill over the years. If you get the error message, you might have been flagged as a "cheater" and need to wait at least a month to get reinstated.
I have redeemed the majority of my points. It's not worth my time anymore.