Ann: Founders Commit to Additional Escrow Period, page-35

Wondering if someone could please clarify if i have understood this correctly....

There are 1 billion shares coming out of escrow to add to the 1.8 billion shares already issued.
After 31st May, does this mean that there are 2.8 billion shares available, or are they only available if the directors decide to sell them?

I know that the directors have committed to not sell any shares, however hypothetically speaking, lets say a director decides to sell 200 million shares, then would that mean that we would have 2 billion total SAS shares (1.8 bill + 0.2 bill = 2 bill)?

I guess my question is around dilution, and if this only happens if a director decides to sell.