While many viewers are serious punters, and successful in their enterprises, many more are in the game as an enjoyable pastime, hoping to make a little, but definitely not getting into trouble because of gambling, as many seem to with pokies.
The forum gives a wealth of information, and in the matter of staking, it seems some experts prefer flat stakes with a low percentage of the bank, and changes probably made at the end of each day.
Criticism of the following would be welcome, but I hope nobody suggests I donate the cash to the barman. Decide on the size of the stake, and then wait till there is a profit of 50 units before doubling stake, or possibly increasing by half. After increasing, continue until there is a further increase, or a loss of 20 units , when you revert to the next lower stake.
Admittedly. backing favourites might take a long time to win 50 units, but at least the increases are coming from profits. Should the success come from horses at higher odds, increases will be more frequent.