The OP raises an important point here and I quote " i'd like to reward all of you because all answers are nice and helpful, but this is not possible".
This got me thinking, since for that question in particular, I found that all the three answers were helpful. I have also had dilemma/confusion in the past whenever I wanted to choose one particular answer. I also believe that this will also drastically decrease the FGIW phenomenon. I would like to know what the community thinks about this. It would be good if answerers can highlight the pros and/ or cons of accepting multiple answers.