Just got a biz cent offer, and I'm pretty sure that me switching from Amex to the new Spark Business cash plus triggered it. I've had a normal "business" spark for years with 2% cash back across the board, but it was pretty much worthless to me with a $100,000 limit because my PO's are usually above that. Spark plus came in at a starting CL of "no pre-set spending" and I've called in twice for $550k purchases and I was approved for both.

With $8m spend a year, I'll take that $160,000 cash back and not even think about accepting a cent invite. Hell, I have a lifetime of MR points banked.

Anyway, move your spending somewhere else, and see what happens.