Of course, that requires time too. Good luck on any of those. Why doesn't the seller just head for the track or the casino and win big and keep his mouth shut. If you received a solicitation in the mail, how did the seller really get your name and address. You become fair game for other vampires out there waiting to sink their fangs into your wallet.
Racetracks are full of system player with cardboard hiding the holes in their shoes.
Billion-dollar casinos should be sending limos to pick up systems players because it's their money which keeps the money mills churning. Develop your own system or method of play. If it works on payer, play a few bucks and see if it works for real. You may notice all systems eventually break down. They fail for some reason over a long run.