I strongly believe in Karma ....I come from the restaurant industry and dealing with customers and staff (kitchen staff -- stress) is a test for anyone. Anyways, I believe business is business and you always need to look after yourself first, but this doesn't mean ignore or treat others wrongly. As mentioned by others, Ethics is a big part, professionalism, and most of all, you have to be a people person.
I personally don't mind helping others and as one said, if someone decides to take advantage of your efforts in a bad way, then you need your Gut feelings and business smarts to make the right decisions. Maybe a quote from spock...lol..."the needs of the many, out weigh the needs of the one"
...within reason of course...hehe
I know I run a directory, and constantly building upon it with listings and other features, but I am also there for the webmasters and to help them in any way I can to see them succeed. In fact, 50% of my efforts there is dedicated to find ways to help webmasters...even here at GG. There are times I even need help too and always happy to get the feedback from everyone
This business is never perfect for anyone and understanding that its an ongoing effort to keep learning and improving on ourselves