Well, I just got this off of one article.
"PFSI has instituted changes to its securities processing policies and will no longer accept deposits of equity securities traded on the Pink Sheet or OTC Bulletin Board markets priced below $0.10. Additionally PFSI, on a case-by-case basis, may be restricting sale activity in such accounts, or even closing accounts when necessary.
Given that PFSI is one of the world's largest clearing firms, management feels this policy is likely to spread throughout the industry and affect a growing number of shareholders. "