it actually cost the company nothing to be listd in the pinkseets or expert market since it cost the exchange nothing to list a company there is no market maker or humans to monitor traders or make bids or put an ask..not market maker stock in the expert market but no human its some AI market maker. For the otc exchange it cost them nothing for companies to 'advertise' their shares or have a 'market' as for the company, there SEC rules about disclosing confidential information etc like insider trading. the SEC is too strict on insider trading rules for companie listed on otc market . insider trading appies to otc markets but the trading is no-exitent there is ZERO volume
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