I also fell for the free sample. I always check my accounts and found my credit card had a charge by HBM Supply, which I had never heard of, and the "free" sample of Revitol had not only a shipping charge but also shipping insurance charge.
It was late Saturday night but I immediately called the credit card company and was told there was another pending charge of $49.95.
This was fraud and I immediately cancelled my card and the credit card company told me I would receive a new one shortly and the charges would be cancelled also.
My next step, and I hope others will do the same, is to file a complaint through the California Attorney Generals Office (consumer affairs).
If others will take action, maybe we can shut these people down.