Robin Van Persie to score ANYTIME is going off at +800 by some accident. So load up on it now. It has to be a mistake, because the prop for him to score and Netherlands win is -180 and for him to score 2 or more goals is at +200.
No, they will cancel the bet even if it's a mistake by them. Ive seen it, with sportsbook.ag specifically. They once posted a boxing match completely wrong and I bet on it (and won) - when it was over they cancelled the bet.