This question already has an answer here:
I would like to recognize a good answer giving away some points to the guy who answered. In this case I did a dumb and incorrect question and the guy foreseen why my question was incorrect and corrected it (curious guys can see it here), but I already did this before some times. Correct me if I'm wrong, but I think that this is a somewhat common practice.
The thing is that waiting for the bounty time and then one extra day to reward the answer takes... time. I know that the bounty time is to avoid giving bounty hastily, but many times the answer for a well-defined question is correct or wrong, no middle way.
Plus, when using bounty hunter the way I'm doing, I don't want my question to have any extra attention. I just want to reward a guy.
What about open the possibility to give away some extra bounty instantly for the accepted answer? Or even better, add a "reward" option, since it is semantically different from a bounty?
Note that it has it value to SO too - I'm actually telling, judging by that answer, that this guy is
X * 2 points more reliable then myself.