There are many nonsensical issues that people make their decisions based on that have nothing to do directly with you or your profile so make no assumptions!
They Did Not Like Your Profile It happens and it’s nothing to get upset about.
Curiosity Sometimes people sign up just to view other profiles.
When I was dating, some of my friends signed up just to view my profile (because I asked them to).
Much of it was worthless spam (the same guy sending the same email to every girl within 30 miles of him) but it still provided a lot of communication for the lady to go through.
Other times, people create profiles and don’t want them anymore but simply don’t know how to get rid of them!
So keep in mind that even on a dating site there are people who aren’t looking to date and there are more than a few of them.
Additionally, I know a few couples who signed up for e Harmony just to take the test and see if it would match the two of them up.
In all of these cases, someone signs up with no intention of ever using the profile.