Data Point:
Before my 12/24 statement, the only AP 10% bonus I had received was a one time courtesy for a GC purchase at RA.
My statement closed on 12/24, as of now I have been paid on AP purchases through the end of November. I do have some interesting observations to report in regards to GCs. I was not paid on any AP purchases that included a GC that I received an email from discover requesting receipts. Also, it appears that I WAS paid on two 1k+ purchases at a local grocery store that did include GCs that I did not receive an email from discover about.
The interesting part about these two 1K+ transactions that did receive the AP bonus is that I had received an email in regards to GC purchases from this store previously in other transactions, so somehow, these two 1K+ transactions slipped through the cracks at discover and I received my 10% bonus.