Pof favors the woman over men it is a fact, they read messages and desciminate towards undesirables and poor men, and unpopular men is a fact! Phuck POF is POS

Don't bother with POF. Use OkCupid if you want a decent, free dating website.

As you can see from their this answer and many others this site is ridiculous disgustingly bad at what they claim to do and they also potentially my be acting in a possible criminal way by logging IP addresses and retaining user details and information without knowledge or consent they are just a sham site run by hucksters liars and pretty much scum. They way they block you is by IP Address and also by details in your profiles and pic's all this information as I have pointed out is retained without knowledge or consent for what purposes no one knows.

Most likely you have been blocked. If this has happened you will not be notified in any way at all. Also if this has happened, you may or may not have done anything to deserve this.
It's just another one of the wonderful perks of pof.