Long time reader, first time posting...
I have had a Discover IT card since 2015.. they started me off with a $1700 limit... I just used it, left it alone and never asked for a CLI... wasn't too concerned with it and to be honest I just started "playing the game" to get my cards where I want them to be recently.... a month ago they gave me an auto CLI to $8000.. I then applied for a second card, a Dicscover IT Chrome for the gas/groceries cash back, their offer included a 12 month 0% APR, cash back match and interest rate of 11.99% which is awesome... i was approved for the second card with a starting limit of $6000. current scores are low to mid 700's on all three bureaus.
Congrats on your Disco gains, and on your first post!
Congratulations on your CLI and chrome approval!
Congratulations on your Discover auto-CLI and second card approval!