I'll have to find the story, but there was a comment on hn when the last story about grubhub or other food delivery services. But there was a Italian place that didn't do delivery but they were getting bad reviews about cold pizza when delivered.
Then they found out company was delivering their food without their permission.
> And so the story unfolds. “If someone could pay Doordash $16 a pizza, and Doordash would pay his restaurant $24 a pizza, then he should clearly just order pizzas himself via Doordash, all day long. You’d net a clean $8 profit per pizza [insert nerdy economics joke about there is such a thing as a free lunch],” wrote Roy. They order 10 pizzas this way, and it worked! The money was free, a seamless transfer from SoftBank’s deep venture capital-lined pockets to Roy’s friend’s business bank account. Eventually, in another series of what Roy hilariously calls “trades,” they just ordered pizza dough through DoorDash for $75 in pure profit.
If I remember right, GrubHub/Doordash will undercut restaurant prices to gain more customers for short-term, then later adjust prices back up once they establish a more stable audience.
Then they found out company was delivering their food without their permission.