Its only an issue if you received the reward directly for the service provided. If you use your Cirrus to fly yourself to a job, the payment is for the job, not the flight to the job. Same as you don't need a taxi or SPV licence to drive yourself to a job in a car or truck. One could even throw some costing for costs of transporting yourself to the job, as you are paying yourself for out of pocket expenses incurred in attending the site, not for an air transport service. Where it comes undone is if you transport someone else and they reward you for the transport directly.