this leads me to a problem, and would mean that I cannot participate and follow rule 13 at the same time.
I stream my participation in jams on twitch, which would certainly count as a "public social media" platform.
additionally, my work flow is: create a git repo, make a non-public itch page, develop game and upload versions each day until it just barely meets the requirement of the theme, then make the itch page public and submit to the jam, and continue updating until the end of the jam.
so rule 13 is a non-starter for me.
if it helps, my game won't look very professional at all.