Up until they did this, I was still paying a legacy $2.50/mth fee for Compuserve and my old account could still log in to the service at gateway.compuserve.com via telnet.
You could not do much in there of course anymore, but I was also once a sysop, and I still knew how to get into the PRO area, do directory listings of their hard drives (and see files with dates dating back to the 70â(TM)s), and with that knowledge run some of the old apps from the command line (like biorythms, and some adventure games), and even things like TE2TRN.EXE (the program that allowed the TI-99/4A TE2 cartridge to transfer files from Compuserve.
And of course who could forget the Filge editor?
I used to log in every few months for a little nostalgia, as well as amazement that the old systems were still up this long