Roger, I’m not 100% certain on this, but I’m pretty confident that the difference here (and what makes it legal for people to sell it on Amazon) is that they are ONLY selling Hemp derived CBD vs. Cannabis derived CBD. Hence the “hemp extract” which is why the Farm Bill passing was such a big deal. As far as I’m aware, you can get CBD from both cannabis and hemp, but the hemp is legal federally. The bigger problem that I see is how misleading all of the amazon products are though because of these amazon regulations. All of the bottles I’ve seen only show the amount of “Hemp seed extract” (ex-2,500 mg Hemp Oil Extract) which is just like buying 2,500 mg of orange juice when I’m looking for vitamin c!
Endoca’s CBD products are sourced from the highest quality organically grown hemp. From seed to shelf, they oversee their entire US operation and have been awarded by the UN for their sustainable farming and manufacturing processes.  In addition to the primary ingredients, this product also includes omega-3, vitamin E and omega-6. There are also low concentrations of essential compounds from the hemp plant. The capsules do not contain any artificial colors, preservatives, GMOs or gluten. They are kosher, gluten-free and vegan.
Great article! Excellent point by Matt, precisely why I found this article. I would just add that the CBD percentage in the extract can be significantly lower than even the 20%, but its probably fair to use that to give a rough idea how much CBD might be in an Amazon product, so divide the claimed percentage by 5!. Claims of up to 60% on Amazon are totally ludicrous, any concentration above 20% CBD become darker very viscous and the CBD starts to crystalize in the bottle! You would need to heat the bottle (which can damage the properties of the carrier oil) to re-liquidize! Also beware of Amazon reviews which are notorious for being fake. As author suggests, contact seller for full data sheets or seek a reputable supplier elsewhere that gives full transparency of information up front.