No - Companies quoted on the OTCBB must fully report (i.e. current with all required SEC filings) but have no market capitalization, minimum share price, corporate governance or other requirements to be quoted.
With WNBD already a current status filer (with more documentation/disclosure then most imo) with pinksheets - the next step isn't a big step imo..it requires more administration which would add some expenses/fees to be compliment with that level.
But typically also as the ability to be taken (seen as) more 'mature' as well as a different crop of investors/traders, financiers, etc. come in to the picture imo.