Ultimately the why not will be because the platforms won't tolerate it. Having a kitchen so bad that it doesn't want a reputation listed lots of times isn't helping their customers any.
A few years ago I was ordering a fair amount off Postmates. One night I ordered something that was decently expensive. When it came the food looked nothing like the picture and was so bad it was borderline inedible. I threw it away in disbelief that a restaurant could possibly be this bad and after a bit of research I discovered that this wasn’t a ‘real’ restaurant - it’s one of these converted buildings that operate on a delivery only basis through the apps.
I tried to complain to Postmates but they ignored me, gave me copy/paste e-mail responses and didn’t do anything.
So I never used Postmates again, and likely never will. A lot of these businesses are run to try to make quick profits at the expense of establishing long-term trust and they will ultimately fail.