There are those among the population who are more concerned with doing the moral thing than they are with being paid, and who would consider it ethically questionable to withhold information unless they get paid for it.

Evidently in your world nothing matters but what you get out of it. How very, very sad. I'm glad I have a higher moral ethic than you do.

And the fact that you do not see the questionable ethics in your question is the very saddest thing of all.