While it is mathematically correct to say that an 8% weekly return can double your money every 2 months and result in $1M in 2 years it just isnt possible in practice. The main problem is that to double every 2 months you must bet your WHOLE bank amount every WEEK (and get the 8% return). So in week 1 you would have to place say 50 $5 bets (or 250 $1 bets, etc). After first two months (when you have $500 in bank) you have to bet that amount per week - 50 $10 bets. By the time you have built your bank to $100000 you have to place $100000 of bets PER WEEK (ie. 1000 $100 bets). This of course leads to the problem of what happens if you have a bad week - potentially you could wipe out most or all of your winnings to date.

Also I am pretty sure you will find that he doesn't actually tell you anywhere how to get the 8% return (that is a good long-term average and not easy to maintain with the large number of bets that this would require) but rather just how to risk it all in the doubling strategy.

By all means order it and give us some more info on what he says - but don't send him any money!