Oh man, I guess I'm getting old/impatient, the majority of everyone's questions literally were answered multiple times, why can't you skim through the post....
I racked up over -30000 donuts.... I have 5 million dollars, every single premium item, grew corn and sped it up, just to see what it's like... inventoried over 20+ of every premium item...
After exploring a little more, the reason you must have 1 (and now <3 donuts) is because the glitch FORCES the game engine to repurchase another scratch ticket, so it forces you to use 3 donuts, even if you don't have em. With that being said, once you go negative you can get whatever you want...
You can buy whatever you want, as much as you want with donuts... but once you leave your donut count resets to what you had previous to it going negative...