Pretty shoddy excuse, IMO.
In my experience, all the gray area supplement sales typically work the same way. Look at a bottle of PHs and what does it normally say on the bottle? Nothing but a long legal disclaimer and vague directions to take 1-2 tablets per day. They don't make any claims or anything like that. They essentially can't advertise because that's just how the the supplement industry works with compounds that technically shouldn't be legal under the DSHEA.
So, that's why forums exist and people who are unaffiliated with the companies can write articles for websites/magazines explaining what the compound is and what you're "really" supposed to do when running a cycle.
Selling people false hope and making claims that a product will block estrogen when it doesn't -- and potentially worse according to what other people are saying in this thread is morally bankrupt. This isn't something on the same level of Cell Tech ads you used to see with guys who have obviously been using gear for years and claiming you can gain 30lbs of muscle and bull**** like that. Probably everyone when they first get started falls for these ads, wastes $50, doesn't see results and learns their lesson they can't trust ads in muscle magazines.
This is different. If this stuff doesn't truly work as an AI in the slightest, it is flagrantly misleading and deceptive to take advantage of ignorant and naive people and is going to end up giving people truly negative results that might be permanent, like gynecomastia and all the other negative effects from not using a proper PCT or running highly estrogenic substances without anything that's going to prevent that conversion to estrogen.
I take a libertarian viewpoint that people should be allowed to put whatever they want in their bodies as long as they aren't hurting anyone else, but if the substance isn't what it says it is or doesn't work as advertised then people need to know about that. If companies aren't going to be honest about what they're selling, then the community should put the word out that it doesn't work and they need to avoid it and use a real PCT.