I am an AU on my husband's Barclay CC. We opened it 8 months ago with a $1500 limit. Husband's FICO scores at the time were around 640 across the board.
A few days ago, someone broke into our car. My husband thought he had left his wallet in the car, so we immediately called Barclay and canceled the card with a representative (we later found his wallet inside the house, fortunately).
This morning, the new card arrived in the mail, along with a letter that stated they have reviewed our account, and increased our credit limit from $1500 to $3200! Cool, we'll take it. I didn't see any inquiries show up, and I monitor both our reports practically daily.
We did not ask for the increase b/c we didn't want to risk a hard pull but I'm happy with the result!
Stats: Husband FICO 8 scores: 649 EQ, 700 TU, 686 EX.
Card: 8 billing cycles completed
Usage: We PIF about 50% of the time. One month we left it nearly maxed out around $1200, had a few months with around $400 balance reporting, and a few months of $0 balance, all mixed up.
Rewards: We've earned $180 in rewards money so far, and paid $47 in interest total over the life of the card. $0 annual fee, so we're still up money 
We use the card daily for basically everything.
