TA shows 1.5b still avail as of 09/01. their history is one of purely selling diluted shares on promo though.
Share Structure
Market Cap
215,905
09/27/2018
Authorized Shares
2,000,000,000
09/01/2018
Outstanding Shares
539,761,592
09/01/2018
Restricted
Not Available
Unrestricted
Not Available
Held at DTC
Not Available
Float
Not Available