Everyone is making good points. How well are they capitalized? What firm offers this? OP should spit it out. (So we can all check SEC.gov for their filings).
But look at the obvious. If a firm makes only $600 on its best traders, that firm will be out of business very soon. In the meantime, it is going to be quite a bare bones operation (in fact, so bare bones I doubt it exists). A firm needs to make more than that on its best guys to provide any support, to turn a profit, and in this case, just to survive.
The traders who could save the most money on this deal if it was real (aka the biggest volume guys) are also the good traders, they are the ones who stand to lose all the money they've made or have locked in a firm, or have a person working at the firm when they are statusing an order or need a borrow or need extra BP or a lockout change during flash crash etc.