You get people to contribute to good causes by being able to influence them and not nag or harass or bully them.
Please get this book and read them because not all talk = influence:
http://www.amazon.co.uk/Influence-Psychology-Persuasion-Robe...
http://www.amazon.co.uk/How-Win-Friends-Influence-People/dp/...
I believe in what you profess but you are going about it the wrong way and even me who believe in your course find you annoying.