That sucks! I think I heard once that if a bull "wins", he gets to live.
Not necessarily winning, per se. But a bull that performs excellently will occasionally live on, mainly so he can be used for breeding.
The weird thing for me when people talk about bull fighting and how horrible it is, is that they have no problem eating beef whose source is likely animals caged up eating processed crap in quite possibly inhumane conditions, whereas the bulls used in bullfighting truly live the king's life. They are fed the best food possible, free ranged, have plenty of space, treated as prize animals, and (for the aforementioned "winning" bulls) have plenty of women. Those that die though are eaten, not just wasted away. The cuts of meat from them is considered the top cuts money can buy.