Your right some are predicting without be sure of their digits and decimal points, this is to show that some people are using the prediction to complete their weekly post quota, because i think making decisions via this prediction the user have to check and cross check and make a proper research before concluding or dropping valid digits, it's something that involves time and the accuracy have to be, i think that should be one of the major reasons while op said it' categorically that it's only people that secured up to 250 merits are eligible to partake for the contest.