I can honestly tell you the turf club in Malaysia is rigged.

While Singapore and HK more transparent.

there are syndicates which are professional in calculating the odds in trying to beat the system. There is algorithm which is able to calculate the best ROI, based on the fluctuating odds.

Depends on the odds bro. If you put it all on the favs, the payout is less.

However, there are occasion where ppl do put silly bets and win huge. A classic example is when Frankie Dettori won all 7 races in Ascot many years ago.

There were a few punters who actually made such bets and one went to win $550k for a $70 bet.