How can you come to that conclusion when you already acknowledged that at least one of the laws specifically forbids-in the text of the law itself-copyright transfer?
Every law that I quoted forbids the provision of "research" materials for academic credit. Obviously, the fact the some of the laws do not specifically mention the word "copyright" is irrelevant. Good luck to any essay site owner who tries to use that as a defense.
Using "copyright transfer" as a marketing tactic is an unlawful practice, as it outwardly communicates to prospective customers that the research material is
their property that they can turn in for academic credit. If you don't believe me, I highly suggest that you study the Boston University lawsuit of 1997.
"Those who don't know history are destined to repeat it."
-Edmund Burke
The gist of nearly every state law is most accurately reflected in the law of California (a precedent-setting state):
"No person shall prepare, offer to prepare, cause to be prepared, sell, or otherwise distribute any term paper, thesis, dissertation, or other written material for another person, for a fee or other compensation,
with the knowledge, or under circumstances in which he should reasonably have known, that such term paper, thesis, dissertation, or other written material is to be submitted by any other person for academic credit at any public or private college, university, or other institution of higher learning in this state."
It is established, legal precedent that offering to transfer copyright/ownership breaks the "should reasonably have known" threshold.