Do you believe someone who claims they have a "working method" to win in sports betting?
Method? No!
There is no "method" that will guarantee anything, but there are people who win more than they lose by simply doing an analyst of the game just as good as bookies do.
Some even brag about having an 80% (or higher) success rate.
80% alone doesn't make sense.
I can win 80% of the games with 1.1:1 odds and still lose money.
I could win 20% of the games with 10:1 odds and make a ton of it.
Finding exactly ~2:1 bets it's harder than actually winning them in most sports.