Bookies have a very limited use by date [10yrs at most I rekon] and in the end it's paying price that counts to the punter, not market % [unless they are betting every horse in the race] which is a bit of smoke and mirrors anyway.
Look at the prices on horses with a good chance of winning a race and the bookies are consistently offering lower prices [and no exotics service either].

A runner showing TF with a bookie at $70 and $50 on the tote is smoke and mirrors because no one is backing it [except on the tote due to overwhelming punter numbers]. That's how they work their % to look good. They load up their odds on the unbet runners while fleecing you on the lower end as the above winner 'Geigeron' clearly shows.

Put up the winners [not market percentages] of Metro Saturday cards for the past 12mths and the tote prices for the same period and see who is paying the top price overall. Certainly not the bookies!

You will make a bit more from the AIS. etc but you will do even better with Betfair. for the average $100 a week punter though, a tote account wins hands down. Show me a bookie [or anyone else] who will do a fexi-bet trifecta?