Linked from a FB post saying "You can now see exactly who's been looking into your Facebook profile", with a FB logo, but links to this url: https://fbwhoprofile2656.blogspot.com/
Which resolves to viewfbprofile.com
Not related to FB/owned by FB, and most likely used for harvesting FB log in details.
I tried to add credit on this site, with correct credit card details, and my card was denied. Not I'm concerned they might have kept the details.
The site has SSL and DigiCert, so I thought it would be OK.
see my review of: gigabitdownloads.com
This site is an identical copy of that one--scam for money.
This site claims to offer downloads (often of copyright material) to members. However joining the site doesn't give you access to the files they claim to have, and there is no way to contact the site owners, get customer support, or even to log in, after paying money to join. They also recharge your credit card--a much higher subscription fee, as well as a cancellation fee if you want to cancel.
nitrodownloads.net appears to be identical.
Don't pay them money!