Does anyone know normally who is the owner of essay? If the writer is the owner, does it mean they can sell it not only once? Thanks

I ordered a coursework from ********. It was delivered with a copyright statement at the beginning, which says I cannot copy, modify, publish, reproduce the content, etc. Also 'You may not submit this document under your own name for academic assessment.' It looks like the writer holds the ownership of this essay. I only pay for reading it!

They're not cheap. If I don't own the essay and can't do anything except reading it, what's point of the service! If the writer sell the same report to another person, I'll be in trouble.

Does anyone have the same experience?
Thanks