It always cracks me up when people ask about a schedule at on-demand companies. There is none. 121 they have 1 hard day off because they have to. 135 the schedule is when the pager goes off it's time to come to work.
Curious why it "Cracks" you up about on-demand schedule. For you info some company's do have "Hard Days Off". Like USA Jet (for sure), Ameristar (Used to at one time, not sure now) Kalitta Charters 2 on 1 off.
Maybe when you get off you high horsey of Captaining C-310/401 you will understand.....
Till then fly safe.....