(1) When laying there is no outlay. There is risk.
(2) The risk (in this case) is always $33 so the payout is not $33, it is $33 plus the bet taken. eg @ 33/1 the payout is $34, @ 2/1 the payout is $66.
(3) Laying outsiders one out is not the fastest way to the poor house, but you will get there eventually, as seen by MG's returns and the need to have a strike rate of close to 100%. 28/28 sounds great but at an average price of 80-85 it's madness. No matter how you look at it, the risk return is way out of kilter. One bad day could literally wipe out months of profits.

Sorry to be the (unwanted?) voice of reason, but this could also apply to most "systems" put forward here.