I only bought one when they were 100% back on Fetch awhile ago and I have 50% off for weeks. I don't think I would get it even if it's free. It tastes like cool whip with chocolate chunks.
Your theory about getting the higher % if you haven't bought too many doesn't hold up for me.
But maybe IQ has not bought any....lol. That would make sense.
There is something like that that I still get at 100% off that I have not bought yet, but others get a smaller % off. I will post when I see it next.