Enz, when it comes to whether or not something is ethical, it's very subjective! So I'm totally aware that others may think that there's nothing wrong with it.
Personally, I think it's unethical if we give them this incentive before the match, as in, we inform them before the match that 'hey, if you win we'll reward you'; since, in my opinion, By Right whenever a team goes to a match they should aim for a victory - so, to me if we offer to reward them for winning before their match it may be seen as questioning their integrity.
However, After the match, if, say, out of gratitude, we reward them or thank them for their favor - then I'd say it's ethical. Perhaps only few of you would see the subtle difference between these 2 scenarios, but for me there is a difference indeed
