Very seldom will a CPA deal ever equal your average player value; and if it’s worth more you lose, if it’s worth less you lose.
It should also be obvious that the higher the CPA deal the tougher it will be on you to produce! Shady programs know this, they will offer to give you $500 CPA and when you produce 100 players worth $200 each they will refuse to pay you saying you have sent fraudulent players. Lets reemphasize that; the second your referrals are not producing an amount greater than the CPA your account will likely be tagged fraudulent, closed and you wont be paid a dime for any of that months referrals.
If you are looking for quick cash, then do flat fee advertising, charge programs an upfront listing fee for a months worth of exposure. You might even choose to tell them the minimum buy is 3 months. Gett the ball in your court and dont let them hold all the strings!
BTW, if I might ask, who has offered you this CPA?