As the first project FSF has launched in years with a current budget of one developer I expect they will be happy to spend new donations on further funding for it. However, it is very uncommon for a nonprofit to have a separate fund for a project that is part of the organization itself, rather than a project which makes semi-independent decisions and is fiscally sponsored by a related nonprofit. The exception is usually when some very large donor which insists on that arrangement.
I was talking to someone who is involved in a nature conservation nonprofit recently - small donations go into the general pot of money for the organization to choose how to spend it. If you want to influence what the money is used for you have to donate a significantly higher sum. They said they like having many small donors because they can fund things that don't necessarily make a big splash in a press release but are important precursors to impact (e.g. researching what projects would have the most impact vs actually implementing a project).
Upon commenting, I removed the snarky part of the website being visually… well, bad. After all, FSF isn’t about design and aesthetics, right? But donate button not working demonstrates the whole seriousness of the effort.