Crash,

Mark didn't say anything about betting with TAB - his e/w bets are with the bookies where the return is guaranteed (and very profitable for Mark's approach).

Place betting could become very profitable now that Betfair is offering it - either laying or backing!

I know of several professionals who do bet exotics almost exclusively but I would agree that you should leave them alone until you have mastered win betting.

I agree with the comments re drinking, loss chasing and progression betting though!