HubEx offers a fixed rate with unlimited task submissions and revisions. The price you sign up for is what you will pay, unrelated to the number of requests or revisions you make.
We welcome any task sent our way and don't limit the number of requests you can send. As long as it's within our scope of services, we can help. The only limit is the number of active concurrent tasks that are included in your subscription, our scope of work, and fair use.
Just remember that if you send 100s of tasks our way, the limiting factor will be the turnaround time. This goes for the sheer volume of tasks, and the complexity of each task. If you have a high number of tasks you need to be done we recommend purchasing additional task lanes.