I think by September they meant August. In any case, don't expect them for another 1-2 months.
Looks like it's not so bleak; this was in today's newsletter thing:
If you've already completed the survey, we appreciate you taking the time to share your thoughts. Your feedback is incredibly valuable and will help guide us as we look for ways to improve our program. Your 500 bonus points will be posted by September 7, 2018.