Receiving a large number of orders per day, such as 500, can be a positive indicator of the health of your account, as it suggests that your products are in high demand and that your PPC campaigns are effectively driving sales. However, it is important to note that receiving a large number of orders alone is not the only factor that determines the health of your account.
Amazon uses several other factors to evaluate account health, including:
Order defect rate (ODR)
Pre-fulfillment cancel rate
Late shipment rate