Assume an online blackjack promotion with house edge of about .5%. The requirement is to deposit $1,000 of your own money, and then you will get another $1,000 match from the casino. You get to keep the $1,000 match and any winnings only after you do the play-thru requirement of $100,000. On $100,000 play you should lose about $500 so you would still make $500 on this promotion.

However, lets assume you have bad luck in the beginning and at half way thru you lose both your $1,000 deposit and the $1,000 match. Should you quit at this point or make another deposit of your own money since the promotion was positive value in hopes of winning your money back to at least break even?