Redbull is known for sponsoring extreme sports most willingly, so I'm not overly sure they care one way or another. In the end extreme sports wouldn't be extreme if there wasn't a danger of serious injury or death. Of course the fatal attempts not so often are used in advertising purposes (if ever, really), but might still end up to news and such. However, in all honesty if I watch, in the news, Youtube, or elsewhere, a clip of some sportsman crashing, I never stare at the ads and think what a scumbag company to help somebody die gruesomely. Commercial sponsors simply are a part of the game, because not all people are millionaires able to fund it all by themselves.