Tyson and his collaborators found that the male profiles that had three profile pictures received 238 matches while the male profiles with only one profile picture received only 44 matches (or approximately a 5 to 1 ratio). Additionally, male profiles that had a biography received 69 matches while those without received only 16 matches (or approximately a 4 to 1 ratio). By sending out questionnaires to frequent Tinder users, the researchers discovered that the reason why men tended to like a large proportion of the women they saw was to increase their chances of getting a match. This led to a feedback loop in which men liked more and more of the profiles they saw while women could afford to be even more selective in liking profiles because of a greater probability of a match. The mathematical limit of the feedback loop occurs when men like all profiles they see while women find a match whenever they like a profile. It was not known whether some evolutionarily stable strategy has emerged, nor has Tinder revealed such information.