Only effects I ever noticed in years past was mil reserve drills in Oct got canx. I don't recall whether you could make them up later for the pay.

I think one time an Oct mil exercise lost all of their planned reserve support. The AD can and will be ordered to keep working for free, even if not funded, but they'll get the back pay later.

Reserves cannot be ordered to report for duty unpaid (OK hypothetically maybe for WW-III). They also would have no assurance of back pay if they did, and their travel and lodging would not be paid for.

I drilled for a points only a couple times on my airline days off, but just to take care of vital admin. Wasn't going to mil drop two weeks of airline trips, jumpseat overseas, buy my own hotel and rental car, and work 16 hour days for free.

I think the mil has learned, in this day and age, not to rely on reserves in Oct.