If martijnp would have cheated to get the reward I´d say your argument was valid. Martijnp sabotaged the contest after it was already sabotaged. The only difference is that he admitted to it and that he had no intentions to disappear with the prize. I don´t think it was a sort of heroic act, but to me it doesn´t seem helpful to have only the admitted cheater in sight but rather the flawed contest and a mud-slinging, in which it was hard to come out clean, even for those who mobilized their voters properly.
martijnp only made such a claim after boxxl outed him for cheating - martijnp was caught before he said anything, and so of course he has to "spin" it to make it sound like he was doing some noble deed
you really are gullible
no matter how you slice it, he cheated and ruined the contest - even if you say others were cheating, no proof to that effect has been presented, and so the ONLY proven cheater here is martijnp
the rest is pure guesswork and speculation, unless you can present us with definitive proof that others indeed were cheating
you can't condemn someone on guesses or "it just seems that way" - you have to have proof
proof isn't needed in martijnp's case because he has admitted what he did (after seeing that he was going to be outed shortly thereafter, he decided some pre-emptive spin was in order)