Have a technical question you can't find the answer to in FAQ's? Ask it here. Game problem questions that do NOT pertain to things like training advice, what would my horse do well in, how much is it worth.
I believe, but don't hold me to it as Nef may have changed it, but if your sponsor expires, the bonuses remain until such time as you try to change/remove one. Once a bonus is removed, you cannot choose another to take its place.