Just to clarify, TBR pre-ordering at Grape requires selecting a bid from 10 predefined amounts. Since a pre-order of $10,000 was received, the opening bid was set at $10,100.
It’s not as complicated as it may seem. For many years we ran a closed auction where only users with pre-orders could participate in an auction but because now we run an open auction, we incentivize pre-ordering to compensate users for their time and commitment. The compensation is a minimum of 50% of the pre-order bid — in this case, $5,000.
The rules are explained
here