This is still something to keep a very close eye on, especially with the well-publicized RAT team enhancement.
I wonder if they're targeting account for airline fee credit scrutiny that are raising other red flags, like just meeting minimum spend. Would be interesting if people posted their annual spend and other factors going forward like in the Retention thread.
Averaged around 12k annual spending since getting the plat card in 2014. Always used the airline fee credit to the max on either gift cards or united travelbank, and Mileage X Amazon gift cards until they took it away.