So why don't I just give them money? Well I have, just not in the way that I want to.
Here is how I see it. Open-source projects are usually on-going efforts. And on-going efforts need on-going support. Some of the open source projects ask for donations, but very few, if any, of them ask for recurring donations. Why is that? They have on-going expenses. Hosting costs, conference fees, travel expenses, etc.