These projects are for clients who know how much they would like to pay the freelancer for the entire project.

In these projects, clients can commit to the entire budget at once, or in stages. Freelancers and clients agree on how much each stage of the project is worth. When a freelancer finishes a piece of the project, (called a "milestone"), the client releases another piece of the budget until it's completely paid.

The client is charged whatever amount he commits to by ZMZ before the freelancer starts working. This way, the client can't back out of payment.