So I just checked and you are correct there has been ZERO dilution on this since 2016, perhaps longer. Below is from their last 10Q filed in April 2016.
Outstanding as of April 19, 2016 Common Stock, $0.001 173,476,221
Interestingly enough, they also had $2.65M in cash from that same filing. Some small notes as well but wondering if they used the cash to pay those off. Might explain why there wasn't a change in share structure from last month.
This has had 3 very large volume days recently totaling something like ~35M shares. Wondering if someone has been sucking up the float for something big coming down the road. Time will tell.
If their filings look good and they coincide that with a big marketing push and sign other brokerages up like eTrade or TD Ameritrade, this could become something big.