It's amusing that they describe kratom replacement of opiates as days sober, though. Or maybe I'm misreading it -- maybe he used kratom to wean off opiates, and then stopped using kratom as well. My experience of kratom did not feel like being sober (and in fact felt a lot like opiates).
If someone is struggling with opioid addiction and switch to kratom, they don't get that same fuzzy feeling, they just feel... better.
Granted, people can switch to Kratom and take a huge dose to try and catch a buzz but most people that want to use Kratom to actually stop will take a maintenance dose. No different from using Suboxone to taper down.
Where did you purchase your kratom? If you bought it from a head shop or another shady vendor selling very expensive products, you were probably taking more than kratom.
I hope one day "reputable vendor" comes to mean a kratom vendor that tests their kratom and publishes the results. This is a particular crusade of mine.
I'm definitely in support of the idea that a purchased product should match the advertising; recreational drugs (alcohol and weed, too) are no exception.