This is incorrect. That isn't how compounding works and is valid only for the first month: compounding 8% per month on an original $10,000 and compounding 2% per month on an original $40,000 are two hugely different things.
I suspect that possibly both Anton Kreil and yourself haven't quite appreciated this.
Nope. Your math is apparently better than Mr. Kreil's (but what he says isn't atypical of the wildly irrelevant and ludicrous claims typically made by vendors).
Not sure what his intention is, but if my assumptions are right (margin of 4 X your money) and you have 2% per month consistently with an original 10,000, my math is damn right!