I don't feel that he's doing any wrong as long as he isn't breaking a contractual agreement. I was on a rod companies promotional staff and purchased a handful of their rods at my price. They still made a profit on the sale. So they got what they wanted out of them. I sold the rods due to not being totally satisfied with their product. I lost money after shipping,bubble wrap,and purchasing PVC tubes.

Just like someone else said, rods are such a pain in the ass to resell who cares if he's sponsored and saving that whopping 10-15%.

Is it your business to even ask ??

I'm not a sponsored angler, but I am sponsored shooting. If I am looking to sell a gun or accessory that was given to me then I will first asky sponsor if they would like the item back or if they have any reservations about me selling it.