I'm a professional coder who is struggling to find time to work on his own projects when he gets home. For me, the biggest problem is finding a large "lump" of time - not quick hlf-hours here and there. By the time I've cranked the computer up, and switched my brain from "eating my tea and putting the kids to bed" mode into "what stage am I at with this RISC OS project mode?" its normally time for bed.
So for me, it would be enormously helpful to a project to take a day off work and lock myself in my playroom. Perhaps any donations could go to fund this, for the NetSurf developers (not for me!)? Stick enough money in the pot so that a senior NetSurf developer can take a day off unpaid, and just work at home? Ask them to describe what the objective of the day would be, so that people can see their money is being used by the code that gets commited to the repository at the end of the day.