facebook experimented with a number of positive or negative words in a person's feed, and then looked at their future posts if they were more positive or negative. Cupid took some segment ofw es in has like a compatibility score, and it took a percentage and said who were not compatible at all, but told them they were compatible,. So what? i'm uncomfortable with what facebook did, but i think what ok cupid did is just outright wrong. It's a slippery slilp, it sure is.