No. You should always wait for the brand to official fund the assignment before you start any work.
When a brand officially hires you for an assignment the fee for your work is collected by us and protected until the brand approves your work, which releases the payment to you.
You will receive a notification if a brand does choose to hire you and fund the assignment.
If you do start working on an assignment before it’s funded then we can not guarantee you will be paid for that work as we will not be holding the fee for you.