I think the title says it all. Whats up with that?
Otherwise you receive all the benefit of promoting the question, at no cost.
Thus, every question should be bountied, all the time, so the bounty concept would become meaningless.
(The other 2 answers have talked about the system, I'm just going to give some tips on how I would have done this since it took me a bit to figure it out)
I assume you're talking about this question, which you posted a bounty on but only got 2 responses. When you bounty a question it puts it in the featured tab, which is only half the battle.
The other half (and I would consider the important part) is continuously improving your question. You've responded to two of the answers, but in the comments. What you could do is update your question with the things you've tried. Did anything come out of Dylan's recommendation? The
vbeinfo feedback could have been integrated into your question that you've tried that. Have you found anything in your google searches that could maybe cast some light into this? What kind of video card is it?
Every time you update your question with the information right up front this bumps the question to the front page (and with a nice unmissable orange 50). This gets your question more visibility, and more tips.
As you improve your question it makes it easier for the next person to help answer it. The people with the now-out of date answers will either update with the next thing to try or delete their now-not-so-useful answer.
I tend to upvote questions that are always being improved because hey, maybe I don't know jack about high rez CLI, but I'll gladly upvote someone who is continuously improving their question.
So in short; consider your bounty like an power up in a video game, it helps but not by itself.
I've tacked on a bounty to the question, now we can use what we've learned and continue on and (hopefully) be a great example of how to collaboratively solve a problem.