Found OptimalStack.com on line through a string of links from Men's Health, I believe. it was a "Free Trial" offer for which I was to pay $4.95 for shipping only. The "terms & conditions" were buried at the bottom of the page, so I didn't even notice them when placing my order for the "FREE sample." That was my mistake. After placing the order, I found them and reviewed them to discover that I was signing up for an autoship. In the T&C, it expressly stated that I could NOT cancel my order once placed. I had to wait til I received the product trial.
The 14 day trial started on the order date, not even the ship date, or the delivery date. I printed out a copy of the T&C and made a note at the top to call the company and cancel my autoship as soon as I received the product. Problem: The product never came. After 2 weeks, I called the company to track the shipment. The USPS shows it as delivered, but I never got it. That's when I found out my card had already been billed. I cancelled all future shipments, but was still dinged for the $89 for the "Free trial."
The identity of this company is well hidden. I learned that the call center is in Salt Lake City. The company (whatever its name) may or may not be there, I don't know. There is no corporate address, oddly, no complaints in top search results, and no whois lookup information that's public. This company has taken scam of a blind transaction to the highest, most professional level. The pages that referred me to the site were reputable, the quality of the landing/order page inspired confidence, but it's all a thin cover for a scam devised to separate people from their money by offering a FREE sample that takes almost as long to get to you as is the trial period, and then charges your card before you can stop it. I'm sure plenty of people have sacrificed $90 to this sham, so be warned.
I'm now in the hassle stage of trying to track the product so I can get it in hand and send it back for a refund. Failing that, I'll have to go to my bank to try to recover the funds paid with my VISA debit card. What a hassle! My fault for not being more careful but--scammed again!