Well I was up 122% last year & up around 40% this years & I doubt that I would get those kind of of returns on the OTCBB or Pink sheets.
OF COURSE you can always show in these stocks where you COULD OF made money IF you bought at the low & sold at the high, but it's not going to happen that way for most people & a lot of these stock will dilute you to death.
The stocks I follow that uplisted were FPP, HSQM, JGBO & shortly GHII.OB.
Few professional investors take these type of stocks seriously until they get off the OTCBB.