They give “Free Chips” away to encourage players to play for real money. The players can only cashout the value of the chip regardless of how much they actually win with it. The requirements are fairly stiff also, so it is difficult to make it and still have money.
However, I am still thoroughly amazed that when they assign manager credits or bonus credits that they take it from your earnings! This is an outrage. The bonus itself is NOT CASHABLE. This is not real money. If they are taking it from your affiliate earnings then it is nothing less than theft. It is silly to count fake money as counting against net profit. This money is NEVER paid to the player and thus cannot count against the net revenue.