Many of the users I supported now have Steem Power, but I have not seen them support my posts.

Perhaps they thought you just did it in the name of God and not expecting anything in return. Gratitude to them may a disease.

It is a little bit disheartening to hear what some of your beneficiaries did, i am sure there are others who have not strayed away from your tutorage. I am also sure the few that have gone astray will not stop you from doing more.
God bless you for the good work are doing sir.