It does matter buddy because the user purpose are the wagering contest, to also win his bet and to have longer wagering time, so it better if he mix strategy but I won't advise him to use the martingale strategy due to the risk involve.
@Betwrong was right the guy was actually mixing things.
Martingale strat is considerable on catching up a wagering contest but it is more riskier same as you said but still an ideal way on catching up numbers.
Its a matter of choice though or simply if you can able to handle it but for me it is way more better on catching up high multipliers with that minimum bet strat.
For pursuing wagering contests i suggest to you just stick to the normal bets such as 2x payout and do not use martingale strategy because it will dried your balance rapidly and the worst thing if you use that method for the contests is you will run out your money but at the end of contests you cannot reach good position to get prizes
I tried it, and it didn't work as good as playing with 98% win chance. I'll try to explain it with an example.

Look, I wagered 914 DOGE with 10 bets, while losing nothing, which was pretty much expected for playing with 98% win chance.
I think, you'll agree that if I were betting with 49.5% win chance, I would, most likely, lose at least 2 bets within 10. So my balance would decrease by 183 DOGE, (most likely), instead of being increased by 9 DOGE.
If you play with a very big balance, and make tens of thousands bets, it almost doesn't matter what strategy you are using. But for a balance that is just 10-20 times higher of your bet amount, betting with the highest win chance possible is definitely better than anything else, if your aim is to win a wagering contest.