Can't pull dividends on the notes (GMS XGM, etc.). If they do, they're in default. It's not a preferred stock at all actually, it's a Senior Note payable.
DISCLAIMER: I am a dirty, rotten penny investor. I am not compensated by any stock. I've asked them to pay me, they refuse. I buy stock on the open market. I sell it there. I like money. I am greedy. I am under the care of a psychiatrist.