A lot of what you've listed either ships along with other software as libraries on platforms like Windows and Mac and/or ship as part of linux distos. Hence SF would not benefit spending time infecting these and as a consequence, the owners have little reason to move away from SF.
That is absolutely true, I had the same thought. I should add that my list was biased away from Windows applications, as I made the list by summarizing the output of:
pacman -Qi|grep ^URL|grep -i -e '\bsf\.net' -e sourceforge|sort -u
- Mesa3d
- Many Linux-kernel utilities (e2fsprogs, procps-ng (ps, top, uptime, watch, ...), fuse, jfs, sysfsutil, net-tools, NFS, acpiclient/acpid, et cetera)
- PCRE
- Flex (the lexical analyzer generator)
- TCL (the language)
- Many lower-level media libraries (freetype, liba52, libmpeg2, libmtp, libwpd, libpwg, opencore-amr, giflib, libcddb, libebook, libexif, et cetera)