I want to reward to someone for writing a good answer for my question.
This reward system will be only for the question owner and who gave the answer.
Users only will give a reward for an answer of his/her asking a question ... Not other peoples' questions.
As far as I know: I need to wait a day to start a bounty. But I don't want to waste my time.
Think also about: They gave me more time to resolve my issue. Sometimes people discuss for multiple problems. People are eager to help each other.
The (arguably) best way to thank them is probably answering one of their own questions.
I assume you've already upvoted the answer; don't go to their profile and vote on the others, that's serial voting and will be reversed.
Having to wait another day for a bounty isn't that much of a problem, IMHO, compared to the 11 years of existence of Stack Overflow. An advantage is that the answer is still 'fresh' and has the attention of the community; a bounty bumps it to the top of the page again, which has more effect when the answer is older.
