No, because you can’t sell something that doesn’t belong to you… “you” being your limited human ego consciousness.
A human is made of multiple components, the conscious ego can’t sell the spirit because it doesn’t own it to make that decision, ownership works the other way around, and you don’t need it soit won’t do it. It can make up and them manifest a lot as it’s got a very creative imagination, but the memory is wiped after death, so there’s not a lot of point trying to make out of lifetime agreements as a human.
What you can do is violate your own principles and conscience to perform activities you would normally not to please other humans to get them to make you famous, give you the contracts and put you out there.
This can damage your spirit in lasting ways that would affect out of human existences, and I think this is what people romantically refer to as “selling your soul to the devil”, but the devils involved are all human.
The rest is mostly bullshit, or blinded explanations of something else, like spirit level relationships with discarnates. However, the contact cannot be binding, because as a human you cannot have informed consent owing to the forgetting/reincarnation mind wipe issue. You don’t know who you are, so like a drunk or a child, or a prisoner who is not allowed to have information, you can’t make informed decisions. The rule of free will kicks in and you are not bound.