I got a nice note from a donor today:
By the way quicklisp is amazing. There are so many times I see a cl library and say, "well that does do what I need, but I can probably write the 10-20% of its functionality that I need right now faster than I can install it." Quicklisp has probably saved me 20+ hours of my time, as well as reinventing a couple wheels. $20 is almost an insultingly low amount to donate after that.