This sounds quite simple but Most BookMakers would require that a bet is made with your own money before the free bet is granted. you would of course, place the bet with the BookMaker and "lay it off" at the Exchange, covering all outcomes. You are, in effect acting as a BookMaker in these circumstances and it is imperative you have sufficient funds in your Exchange account tto cover for this.
It is possible to continue making matched bets, taking advantage of BookMaker's Reload Offers and often generous odds. There are even calculators available which will work out if its worth placing a bet or not. it would be advisable not to overdo this with the same BookMaker as most of them will have Employees who will be looking out for Bettors taking too much value and this could have your account restricted to smaller bets or banned altogether (gubbed).
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