Yes, they do. And they get their account banned as a result because each download has a unique signature that the developer can trace back to the user.
As such, it is safe to assume that these leakers are just people who are sharing other people's files, which they have probably gotten when working for/with that other individual.
This is why, before starting to work with or hiring someone, you should conduct your due dilligence and check if they have "leaked" anything in the past. If they did, chances are they will leak your files too.
Thanks for the files, I'm very happy, I'm going to test this project, if you have the Shinemaker source, share it for us, whatever I do again with it, I'll also send you new html and scripts here, I'm doing some new events