f you do not want to get results that are futile, yes, checking is very necessary, especially for the IEO project because if we choose the wrong results it will not be too satisfying, especially many launchpad that do not provide ROI and actually make significant decreases of up to 10x.
Things could change even during the campaign so it would be wise for someone to keep on checking on the project to make sure there isn't any scamming going on.
Bounty manager have the right to change the law of participation or to do in any case, so I will not call them fraud. But it is true that when you join, you should focus continuously to be able to follow the rules they have given