The site is and now has been run by Match.com for the past few years. The CEO is Mandy Ginsberg. I can tell you that PoF actively scams its male users and even the Attorney Generals Office of Texas is actively investigating Match.com for fraud.
OKCupid who is also owned by Match.com was hacked and they found the ratio to be 17 to1 for men to women.
PoF keeps dead or inactive profiles on its site to boost their numbers. So many of the women you email havent been on their for years. In one case I saw a woman I knew had been dead for over 4 years.
I also did my own non-scientific survey and found the ratio on PoF to be upwards of 50 to 1.
Bottom line dont waste your time there.
If it looks to be good to be true, it probably is. Why would any 40 something that looks like 20 something be on a dating site, have poor grammar and syntax structure in their sentences, and call men, "Their King" or "My Man", what women really says that?
There is no blacklist, it is just PoF scamming their own patrons.