AngryPixie,

I think you should re-read this report and then look at how betfair works. This report is based on using totes. Betfair is not a tote.

It said the only problem with the technique was that

Bets were made at the last possible moment (save a few instances when the author was shut out) to get the closest approximation of the final odds and expected returns. Unfortunately, on average only 57% of the final pool totals are viewable on the tote board when betting on a race ends. Much of the betting occurs in the last few minutes and posted pool totals change when betting is closed.

This is not how betfair works. Betfair is not a tote. Thus the major issue is resolved instantly.

Good Luck.