Did you hear about the endorsement? It is the sponsorship deal in which a drumstick company agrees to give the drummer a bunch of free drum sticks, other gear, and cash depending on their contract. In return, the drummer agrees to advertise them trough videos, clinics, events, etc.
In this equation the quality of a drumstick is irrelevant. Basically professional drummer will use the sticks of a company with the highest bid, it is simple as that.
In case of purchasing the sticks on their own, they probably go for one of the best drumstick companies I mention above.