Doesn't it involve a new account, even when Synchrony issues both the store card and major network card? I vaguely recall some excitement when there were some supposed PCs, but think those "PCs" all later resulted in new accounts being reported.
I could be mistaken.
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