I do this because I'm in it for the long run. Sure, maybe it won't pay off, but my "first directive" is, to get people to use my open3A. If they've put all their data in it and miss some feature in the future it is more probable that they will just buy it from me instead of going through the hassle of moving to another solution. If they have a good support experience that just gives them a better feeling with my software.