Brian nails it and outlines best practice with no sharing active deals w/new investors for 506b deals. At a minimum, in establishing that pre-existing relationship by slowing the process down, having that introductory call is critical to understand the investor's situations (financial, objectives, suitability, risk tolerance, experiences, etc) is an important aspect. Sharing additional information on the issuer / firm and GP behind it with follow up emails. Great sponsors are great educators first. That is where trust is built. It can't be rushed.
You will often hear the term "cooling off period" which is not well defined but should be achievable over say a 30 day period. By not discussing active deals, taking time to have those dialogues to establish knowing your customer and determining suitability for these types of private placements, recording these conversations (CRM tool), its a process and important for the investor as well as the sponsor, which also helps support any future regulatory reviews.
Lastly, I will note that the deals should be presented to investors from the issuer (key principals w/actual roles separate from mere marketing / selling the deals) or licensed reps of broker / dealers who can market these types of opportunities, take qualification exams and are heavily monitored, regulated.
Where I see grey areas on BP are folks that are raising capital as part of GPs and that is all they do, are not licensed, and in posts are recommending sponsors and that is where I think folks may get confused as to what's their agenda, even if they are not disclosing a deal itself, operate around the fringes. An enthusiastic investor is one thing, an enthusiastic investor (LP) who is also acting as a part time promotor / paid capital raiser for the (GP) is another.