When talking to possible sponsors, "professional"... it has a better ring to it and instills a bit more confidence in their decision to sponsor. I always make the opportunity seem as professional as possible. I think the KCBS refers to it as a professional circuit as opposed to non-sanctioned events which may be considered amateur or something similar. "Undertaken as a means of livelihood or for gain" covers us. We're all trying to win and "gain". I know I am.
KCBS Member #14287