Professional genealogists may use this site or family history center resources to research information for and provide documents to a client for the client’s personal, noncommercial use. However, professional genealogists may not solicit or arrange business, promote themselves, or receive payments on this site or other Church property.
This seems to indicate that this is not to be used as a communication platform for discussions with clients, and that the clients' end use must be noncommercial, but it doesn't explicitly prohibit payment in general, it prohibits one to "receive payments on this site or other Church property."
I read that to mean no cold-calling accounts you see on Familysearch.org while looking through records in an attempt to solicit services and no arranging payment or discussing the arrangement for the hired research using their built-in communication tools.
I also understand that this wording could easily be misunderstood, so is there documentation that clarifies these points 100%?