The vendor LegalEyez is on multiple markets and has racked up thousands of sales.
He claims to sell amphetamine pills and cocaine. The amphetamine pills have been tested and are in fact Ethylphenidate, the test can be found here http://www.wedinos.org/db/samples/search (Search for W003045), or at the mirror http://wedinos.tripsit.me/result/W003045.
Looking through the review of his "cocaine" people are reporting that it has effects similar to Ethylphenidate, and are suspicious of it not actually being cocaine. Someone over on /r/darknetmarkets has tested it and it did in fact come back as Ethylphenidate (https://reddit.com/r/DarkNetMarkets/comments/23cpll/legaleyez_cocaine_tested_as_ethylphenidate).
Ethylphenidate was a legal high in the UK until April 10th when it faced a 12 month ban (https://www.gov.uk/government/news/legal-highs-to-be-banned-under-temporary-power).
Why has this been allowed for so long? Surely, at the very least, he should be forced to advertise his goods as what they actually are.
Who would not allow it? I think the way to go about it is just like this - make posts and keep the community informed. I hate that type of shit too.