Deeply Concerned
When it was described to me, the concept of Sponsored Reserve was as follows: You would be a full-time employee of Airtanker, flying their aircraft in peacetime wearing civilian uniform and operating on the civilian register for civilian or benign military tasks. However, in wartime you would be "called up" and operate the same aircraft on the military register for risky military tasks.
Not sure if that's still the plan, but someone will probably correct me if I'm wrong.