This is a small list, there are hundreds of these sites, best to follow a HIYP monitor in case you are interested. totally, all HIYP will turn into a scam sooner or later, but some people still like to take the risk when they watch a new site.
HYIP Monitors are almost as complicit as the Scams they promote. After all, as long as they get their Referral Fees huh! There was one where I eventually got a Monitor to admit by Email that a HYIP they were promoting was a Scam - which I consider a Result. A Monitor Trick is to offer a Refund to anyone who has been scammed by a HYIP they promote. Try getting one of those - as that's nothing more than a Ruse to make People think it's a guaranteed Investment. They look scammy when they insist on telling their Readers a HYIP is paying when they (the HYIP) still hasn't paid you, even after you've sent them TX ID No's of your Payment to them (the HYIP) and Screenshot Proof that they haven't reciprocated.