Sorry to say but for me betting on high winning chance give me worst result when I participated on wagering contest compared when I use bigger payout like 1.2x up to 2x
What do you mean with "worst result on wagering contest" exactly? Wagering contests are all about how much money you wagered, not how much you won during the contest. So statistically you will ALWAYS (even if you are a damn unlucky person ;-) achieve better results when playing with very high win chances because your stake wont get melted as fast as it does when you play with eg. 49.9% win chance