I think instead of "slightly jaded" you mean "extremely crazy."
Use a tiny little bit of common sense here please... what "recompense" could a racquet manufacturer have to offer one of hte top 3 that would outweigh the ranking points and money gained by winning the title? What possible leverage could Head have here?
And think for a second about the devastatingly bad publicity for player, racquet company and tennis as a whole if something like this ever came out. So they'd really risk that just to put in a plug for a new racquet, for the small minority of people who actually know what racquets Murray and Djokovic are (ostensibly) using?
Journeymen players fixing matches for betting interests might be plausible. Top 5 players fixing a GS final to do Head a small favor? Insane.