My usual mode of collaboration with others is like this. If the profit you expect from me in a game is assumed to be 5000U, then I will pay you 5000U. If lose the game, you will compensate me with 5000(i paid you before)+5000 * 1.3=11500U, and all transactions will be made using escrow to keep ensure the fund security of both parties
Some kind of shady scheme.
So, initially, I provide you with information about match-fixing (for example, CS2, tier 2 league), then I send money to some escrow service? After that, you place a bet? I don't really understand how this works at all.
And in general, match-fixing is an unreliable thing, plus it’s illegal. I wouldn’t advise anyone to get involved with it.