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They use TU for hp as well. Congrats on auto cli. You could always give it a try. The system will warn you first if they need to hp. It's up to you at that point to decide whether you can afford the hp. Many have only received $500 increase after a hp. A few $250 Others have gotten over $1k. So it's really a crap shoot with Discover.
Not bad for Discover. Congrats on the increase.