There is no science on this page and that is the whole design. Each of the eight answers carries a number, the numbers are added to a starting score of 100, and anything above 100 or below 0 is clipped back to the edge. Five combinations shift the total a little further: three dots plus a long wait costs eight, an ex brought up alongside tears costs ten, real laughing with an even conversation and a hug pays ten.
Where do the numbers come from? Somebody picked them. That is the honest answer, and it is worth stating plainly because a percentage sign is very good at looking like evidence.
Assigning numbers to ordered answers and then adding them up produces something that behaves like a measurement without being one: the ranking may be defensible, the distances between the steps are invention. So the sixty-five point penalty for a repeatedly mentioned ex is not a finding about dating. It is a joke about how much attention that detail gets at one in the morning.
The calculator makes no claim about the other person, none about you, and none about what happens next. It exists because the night after a first date is spent re-reading one text message, and a silly number is a cheaper way through that hour than another read.