Here is a clever way to collaborate and work on projects with others from all over the globe, and get paid for it before just handing them over the files. This is a great way for creatives to no longer wait for the person on the other side to hold their end of the deal.
Check out Fileship.io
You can send your projects, and sessions and then wait for the person to make the payment before they are allowed to download the files you are sending over.
Its like Wetransfer and Paypal got together and had a love child!