lol I got that message too.
Wanna know where he got his strategy from? American Evangelicals. John Oliver had a segment on this last year. In short, the evangelist would send you $1 and say that if you return the dollar and another $100, you would get far more in heaven. It's called the seed promise. Invest some seed money and watch it grow.
Feel free to see the video if you want, this isn't meant to be spam, just an example/source for my statement. watch at the 5:00 mark forward.