Hit on this through a friend and made £100 in a month. That was being cautious with it and only doing 1 bet at a time.

It's called Profit Accumulator, which is a sytem for doing "Matched betting". From what I can see, matched betting has been around for years, but not as simple as this.

It takes a while to get your head around how it works.

Makes money from bookies's free bets. Converts about ~75% of the free bet into money in your pocket.

Using tools on the Profit Accumulator website, you place an initial bet with minimal losses. then use freebie bet with a massive advantage.

The advantage comes because half the bet is free and you bet for and against. It depends on close odds. The site lists the best for vs against odds. Betting against is effectively acting as the bookie vs some other punter's bet.

Say you have a £20 free bet and you see England to win at odds of 18 (sounds about right!) and loose(not win) at 17.5

Use the tools on the site to figure you need to bet 19.48 against. The calculation takes into account stake not returned and the against bet comission.

If england win, overall you gain £18.58

If endland loose/draw (not win), overall you gain £18.51

Really the only traumatic bits are the liability of the against bet and knowing if you make a mistake...

Because you're the bookie you might have to pay out for someone elses win.... but the amount you pay out is always less than what you win on the other end.

You need a bit of money to start with. The best bit is you can join for free and get instructions on 2 free bets that you're guaranteed to make money on. I made about £30.

there's some videos on the Profit Accumulator website which probably explain it better than i can.

With a premium account you also get added to a very busy facebook group which constantly has new bet opportunities and much discussion about existing ones.