Do you believe someone who claims they have a "working method" to win in sports betting?
It's a big no, not unless if that game is scripted, I'm thinking betting on a Wrestling match, which I believe is most likely a scripted game.
As we often see, there are a lot of accounts, usually newbies, claiming they have a winning method in sports betting. Some even brag about having an 80% (or higher) success rate.
At first impression, do you believe something like that actually exists?
Or is it just another tactic to scam people?
You already answered your question.
Yes, they totally wanted to scam people. Why?
If they know the outcome of sports betting, why don't they place a large bet to secure a huge profit since they already know the result?
Just think about why they need to persuade people to trust them instead of doing it themselves to earn more money.