That is a clear scam.
Very clearly explained, and I believe some of the fraudsters unfortunately come up with the idea of making some money when they read articles like this. But it is certainly important to warn people and dispel the myth that someone is selling fixed matches for $10 or something like that.
Yet I'm sure there are fixed matches, because many clubs are punished for such things - but such information is generally held in very narrow circles of people, mostly organized crime.
For those who are interested ->
List of match-fixing incidents