You should not use the win rate to assess the tipsters of course, and in fact some tipsters also keep track of their results with the unit system.
one thing i do when i want sports betting is just follow other users who bet with bitcoin which i think ain't a little amount
coz i'm not proficient for analyzing or think who will win or even ended in a draw
For example, if someone is able to win 80% when all the odds are just 1.1x, he will actually be losing money. But if someone is able to win 50% when he only bets for matches with >2x odds, he will be winning money.
So, a high win rate doesn't imply the tips are good, and vice versa.