Lots of people, young and old buy lotto tickets, reason, a chance to become rich, but the large percentage of those same people probably don't give a shit about racing and the fact that racing don't have a big prize pool for something to attract them probably means you won't attract new people
i started a thread about jackpots, on course maybe but maybe in today's world that might not work but I reckon something like this.
Saturday only, you take the last 4 races the quad races from NZ, you then take the four main Eastern State meetings and their last four races,, that's 20 races, if we have a harness meet in NZ you throw that in as well20 or 24 races, only thing you need to fine tune is what to do with small fields.
To win you need to pick15 winners, or if their is 24 races 18 or something, if it's not struck it jackpots, but you get a collect for those who pick the most winners in any given day.
As you only have to pick 15 winners you only need to pick 15 races but if you pick in all races you are increasing your chances of winning, something that's Saturday only, maybe properly promoted by the TAB, sure it might start slowly but as it builds so does interest, gee if it only reached dizzy heights once or twice a year it must be better than Melbourne Cup day being the only day many take notice of horse racing.
Maybe get rid of percentage bets and maybe 50 cents a line adjusted based on the number of picks per line.