They do have this to work with:
CFR 47 Part 95
ยง 95.213 (R/C Rule 13) May I be paid to use my R/C station?
(a) You may not accept direct or indirect payment for transmitting with an R/C station.
(b) You may use an R/C station to help you provide a service, and be paid for that service, as long as you are paid only for the service and not for the actual use of the R/C station.