"I would think that Jim Briscoe could find work advising or consulting with a potential partner,..."

That is far from likely in my opinion.  Among other things, JB remains a shareholder (in so far as I know).  That means that he would not be selling independent unbiased consultation.  Hence, he can not offer such a service for a fee, certainly not without disclosure.  And he can't offer "free" consulting as it has no value under the law.