How are we able to do that?

We work on volume and between us and our agency alliance sell many properties, so we can afford to give money back to you the purchaser.

Developers need to make sales. And they give selling agents a marketing fee. 

To keep those sales levels up we will give away to purchasers a handsome portion of the marketing fee.
You will get cash back in about two to four weeks after you purchased at land settlement.