Well, I think I've found my internal limit with Discover. It's 40k. I was at 39.5k and knew I had no business hitting the luv button again, but you know how that goes.
Received 2 day message and it was 2 full business days from Thursday until after the holiday weekend. Logged in and saw a $500 increase to 40k.
Classic Discover, the kings of customer satisfaction. Definitely the best $500 increase ever. Puts me at an even 40k and isn't technically a denial. I get it Discover.. I won't hit it anymore.