Well, I don't know if there's any chance of there being any manipulation in the games of the major football leagues that I bet on, so it's difficult to answer your question, but I believe that it's unlikely that a professional player from a major European football league who receives a millionaire salary and has contracts with major brands would be stupid enough to get involved in some manipulation scheme.

I also highly doubt that a referee with a professional career and who receives a salary and works in the major European leagues would be stupid enough to get involved in manipulation schemes. I honestly think that nowadays these schemes no longer have space in the major leagues.