Instacart should be on the line for promised tips if the order was successfully delivered. The onus is wholly on Instacart if they permit a change in contract p

Instacart should be on the line for promised tips if the order was successfully delivered. The onus is wholly on Instacart if they permit a change in contract post delivery. They should ban any customer doing such for a minimum number of days and ban them from the service if more than three times total. However the only winner here is Instacart because they are still getting paid in full while those doing the work are being defrauded.