MM's have a certain amount on the BID or ASK side and they only show 10,000. As long as the seller requests their shares to be hidden they are legally able to. Usually it is when there is dilution, but I obviously know this is not the case with GNGR as there has been no dilution.
Some companies have 100 million shares to sell and the MM's sit there at .0001 with 10,000 on the ASK as millions and millions are traded.
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