I've found that as long as I get the "Great news!" email right after I make a purchase, I've gotten the bonus even if the transaction is later broken up.
Granted, I'm only talking about 5 or 6 cases. Not a huge sample size.
Personal spend: Amex Gold, Amex Schwab Plat., BofA PR+CCR(x2), Costco
Business use: Amex Bus. Plat., BBP, Lowes Amex AU, CFU AU
Perks: Delta Plat., United Explorer, IHG49, Hyatt, "Old SPG"
Mostly SD: Freedom Flex, Freedom, Arrival
Upgrade/Downgrade games: ED, BCE
SUB chasing: AA Platinum Select
