Technically speaking, by established norms for determining such, HEX is not a scam. It is, however, a giant shit token, and this picture is all you need to know about what it does. The only thing you can really do with HEX is hope other people buy it at a higher price than you so you can sell it to them. Let's not fool ourselves: this is the case with many cryptocurrencies, but if the end goal of creating something is to profit from it then that thing doesn't necessarily have any value at all.

Its smart contract uses a novel algorithm for generating interest when staking, but other than that it is completely useless.

So, join the HEX sig campaign if you must, but knowing who Richard Heart is and what he's all about, I wouldn't expect any sort of payment in return. Seems like a needless gamble to me, but that's just me.