There are those in the dating industry who appear to genuinely enjoy "the chase." For whatever reason, the concept of chasing someone who may not be completely interested in you is appealing to both men and women.
Perhaps it's the excitement of going for something—or rather, someone—that is uncertain, or perhaps it's simply the anticipation of the unexpected.
Although the chase may be enjoyable, Anderson claims that it will ultimately only make you appear desperate. And even if it might be acceptable at first, it will be difficult to overcome in the end.
Although the chase may give you a sense of achievement, Anderson claims that it will ultimately only damage your sense of value and self-worth.
This is most likely the best explanation. If someone is truly interested in you, they will show it right away, but there may be certain ladies who truly love the chase.