I have outlined in the past how a company can prevent being labeled a scam - unfortunately, 'scam' is the default position a company will find themselves in because so many companies turned out to be thus.  Even if they're not outright take-the-money-and-run, they'll have been take-the-money-and-delay-delay-delay-excuse-delay-promises-delay-excuse-underdeliver-point-to-terms 'scams'.  Sure, that's technically not 'scamming', but it's far from being honest.

And as far as that goes - HashCoins unfortunately have everything going against them, and they're hardly new.  Whether it's posting renders instead of actual images, stating one date but delivering a long time after, claiming certain hash rates with cgminer screenshots that were proven to be altered, slapping badges on existing miners and selling them at a premium, sending review units but with strings attached, selling miners ostensibly based on existing boards and only wanting to explain the difference if you pay $100,000, copy/pasting the KnC terms and conditions and so forth and so on.

Yes, of course, I don't blame them for not wanting to interact on this forum either with everybody just yelling 'scam' - but they really shouldn't be expecting any different; while at the same time, they can remedy it with just a few posts.  If they're unwilling, so be it.  It's when they're unable that people will just continue thinking something's amiss.

I'm sure they have something - just what that something is, whether if lives up to the claims, and whether you'll actually get it in a reasonable amount of time, remains to be seen.