Yes, I did have it enabled. Though the terms say you "must have it enabled", not "must not have had it enabled". Perhaps there is a roll-out difference.
Well this feels scammy, or at least annoying AF. I tried toggling it on to see if that would make the credit appear, even though I'd never had it on before and never needed to use it, and since my balance was under $5, it auto-charged me $15. All I wanted to do was try to make the free $20 banner appear, and I didn't get that either.