They're talking about how they're so sure they'll make money with it been a free to play.
Basically, Roberts is giving the standard spiel about a variety of players, some will spend and some won't, be as long as they attract a large enough crowd, everyone will benefit.
Which is all good and well, but IMO, they should also combine it with the Valve method of making money...
Which is allow the user base to make content (which they're doing) and allow them to charge what they want - in dollars and credits. Take a cut of the dollar value.
So every instance of the ship sold might cost $4 million credits + $4 USD...
And although dollars will scale linearly to the credits ($1 = 500k credits), it's up to the ship designer/seller to determine the ratio cost of the ship (i.e. all credits, only dollars, or a 20/80 split, etc).
That way, the userbase has the freedom to make money from their work as befits their business strategy, and RSI gets an additional revenue stream to support their works.