Here's my scenario...
A little over a year ago, I was employed at airline A and held an upgrade for ORD. When notified of the upgrade, I informed them I had an interview scheduled with airline B and, if offered the job at the interview as rumored, I was going to accept it. Airline A held a grudge and I didn't fly for three weeks.
Airline B had a crew base 45 miles from home and flew airplanes I had lots of experience on as a CA and F/O. Airline A had a base in ORD. I did a ORD commute earlier in my career and didn't like it. Anyway, airline B offered the job at the interview and I took the job. I upgraded in less than a year. Sitting SC reserve at home is substantially better than sitting SC reserve in a crash pad in ORD.
You are not an employee of airline A, so don't be concerned about interviewing at airline B.