He was not so successful at the task he asked advice for
Did he do what you told him to do?
I never ended up giving him advice.
While I understand that you didn't want to give him advice, most people would believe that what you did wasn't very nice. Sometimes you're expected by society to help others when they ask for it.
I'm not stupid enough to give my friend advice without asking for a reward.
It's always nice to receive a reward for something, but sometimes it is nicer to just help a friend in need. Would you not want your friends to help you for free if you ever asked for it?