I would like to expound on two points you put forward, "They generally trade or are valued by the market anywhere between 10 and 30 times actual earnings depending on the market sector". NOT SO in the pinks.
" It's all about the size of the float, and whether or not dilution is going on" While this is true "getting noticed" generally causes volume to increase relative to past volume.
Speaking of dilution?
In the case of MTPR, when do those restricted shares come off of restriction? Are the restricted shares in any way tied to the preferred? What is the conversion ratio on the preferred? These things can cause huge dilution.