We have seen some people or groups, who claim they are hardforking ETH,.
The plan of the first, NOVA, whose intention was to scam others of their hard earned money, was foiled early enough, because it was using a fake.
ETCV on the other hand was not quickly detected, but its team was anonymous, which i feel is enough to suspect them of scam.
Right now, its telegram account has changed when i checked.
It's website is suspended and so on.
They are now asking people to buy their coin, which does not exist.
Therefore, the only genuine hardfork, is the constantinople.
I have never heard of those projects that can be related on the upcoming constantinople fork. Because the fork, happens on ethereum itself, and no investment needed, you just need to stake your ethereum coins in your MEW wallet, or any supported wallet. Make sure to read the update post on how to participate. Be careful also on some poser projects claiming that they also have a fork for ethereum.