Maciej Ceglowski of Pinboard:
What if a little site you love doesn’t have a business model? Yell at the developers! Explain that you are tired of good projects folding and are willing to pay cash American dollar to prevent that from happening.
The sheer volume of people asking me for this was one of the biggest reasons I launched Instapaper’s $1/month Subscription program, which offers almost nothing for the money — just the knowledge that you’re supporting a service you like.
People pay out of sheer goodwill. It really works.