The article doesn’t mention it, but the Fred Fish disks were also made available via FTP on the early internet at least by 1991. I don’t know if this was official or unofficial.
Handily, there was a utility that let Amigas read MS-DOS-formatted double-density (720K) disks without special hardware.
Fond memories of going into campus computer labs and FTPing FF disks onto the lab PC and copying the files to disk. The process was error-prone. I’d take 10 disks in and end up with 7 - 9 my Amiga could read.