Manchester - if you buy a pick from an expert like Fezzik what you are after is his opinion on which side is sharp. How you bet the play is matter of choice. If you anticipate a big line move, which is common after Fezzik releases, perfectly reasonable to make the bet with the intention of scalping the line shift. Despite what Lloyd claims, this has advantages. You can wager a larger percentage of your bankroll and, assuming the line moves as expected, lock in a profit regardless of what happens with the game. If the line moves against you you'll take a loss but it will be much smaller than if the game loses. If Fez is getting line moves right 90% of the time, which has been asserted in some other threads, scalping those shifts for very large amounts would be a lucrative strategy.
Fees are also something to consider. As Steve has mentioned, you can't be betting $150 and paying $39 in fees. That's an insurmountable 26% tax. If you have a smaller bankroll, get excited about a Fez GOY, and want to profit - not just flip a taxed coin - playing a much larger percentage of bankroll to scalp the line shift would produce more profit. And, if the line moves the other way, you have a valid argument to come on the boards and tell the handicapper he sucks. Regardless of game outcome - if the line moves the other way and closes worse than what the handicapper suggested that was a bad pick.