These people are a blatant scam.
They send you a free offer "from Amazon" (false) or other legitimate company. They charge $4.95 for shipping, and 2 weeks later $98.41 for the "free gift", which is a small bottle of some cream that does absolutely nothing.
And then every month after that they charge your card, under a different merchant name.
They have multiple websites promoting their scam as if they are recommendations from independant site.
DO NOT BUY OR GIVE YOUR CREDIT CARD TO THESE PEOPLE.
I had to call Visa 5 times to get them blocked from charging my account.