Z:gnu-www-ja-thegnuproject--368146-Most of the FSF's income used/en

Most of the FSF's income used to come from sales of copies of free software and of other related services (CD-ROMs of source code, CD-ROMs with binaries, nicely printed manuals, all with the freedom to redistribute and modify), and Deluxe Distributions (distributions for which we built the whole collection of software for the customer's choice of platform). Today the FSF still  sells manuals and other gear, but it gets the bulk of its funding from members' dues. You can join the FSF at fsf.org.