JPG3392

I wouldn't worry about the merger. That will take care of itself in the near future.
You will earn 1 mile for each $1 charged to your card, no matter where the car is used. These miles will be posted monthly, at the time when your statement period closes.
You can gain some extra miles by signing up for United's dining program and registering your card. If you fill out a profile, you will receive a bonus of 1,000 miles. Once registered, you receive an extra 3-5 miles for each $1 spent at appropriate times at the restaurants that participate in the program. You also earn the usual 1 mile per $1 from the credit card itself.