Sorry, you're just wrong. I have two that came in full retail packaging, one boxed with beauty ring, one in a blister pack. They are genuine.
As far as I can tell now, every main manufacturer has now claimed that Fasttech is selling counterfeit copies of their products. Innokin, Kanger, JoyeTech, Liqua, etc...
FastTech DOES sell counterfeit items, there is no doubt about it. For instance, I've bought quite a few knives from them that were labeled something like "6" folding camping knife" and when I get it, it has "Gerber" or "Buck" branded all over it and I know full well it's a fake. Fasttech even scrubs those brand markings from the photos and they never claimed branding on them. You only find that out when you unbox it yourself. They don't deny it either. HERE is the difference: FastTech has never once claimed a fake to be genuine that I have ever heard about. If something says "Kanger Protank", it is indeed, a Kanger brand Protank that has most likely been acquired outside of the channels that Kanger approves of where they can price control. Kanger has an incentive to stop the consumer from buying at FastTech because it weakens their price control scheme. I'm not picking on just Kanger, Inokkin is doing the same thing and so is JoyeTech not to mention others.
It's safe to say that if Fasttech says it is a brand name, then it is.
There is also something you should understand about the culture among Chinese manufacturers...
Manufacturers that qualify as "best of the crop" and can be trusted are the ones most often contracted by American companies to mass produce their products for them. Not just Americans, I'm just using this as an example. For instance (and this has actually happened to Cisco several times), Cisco Systems contracts Chinese manufacturers to to produce products that Cisco designed in California. They hand the design and source for components to the best bidder that they feel they can trust and tell them to manufacture a certain number of units, and here are the serial numbers they need to have from XXXX to YYYY. The manufacturer will then fulfill their obligation and do so. THEN, before they tear down the lines to start manufacturing something else, they will run off an extra 1000 or 10000 items and re-use some of the serial numbers (or just make up some fake ones, whatever) to sell themselves on the open market (which is also what they promise to never do by the way). So, the products are EXACTLY the same as the "genuine" product, they are just now what we have coined "grey market" goods.