You can join niches like non-smoking, organic, psychic, cigar, coffee, mullets and classical (music). The site is mostly for verified college students and alumni.
If you can fit the bill, however, the site gives you awesome features.
The amount of users should not bother you as all you are trying is to find one mate.
Currently, POF is the fourth most visited dating site in the world. The one thing that puts Ok Cupid on the list of best free dating sites is the compatibility feature.
The site has garnered over 20 million users and the number continues to grow.