Why were you trying to buy HYIP scripts in the first place? That just means that you were trying to scam people yourself.
Anyone who sells HYIP scripts probably operates one themselves, that's no surprise. The fact that they are willing to basically facilitate scammers with what they need is proof enough that they are scammers themselves. Plus, all HYIPs are ponzi schemes and you should know this. There are no legit "HYIPs". There are only ones who last longer and ones who doesn't last.
No surprise at all that eventually all his associated sites went scam. That's how HYIPs work.
Back to business - why were you trying to buy HYIP scripts? You clearly have done enough research in this thread alone to realize that there are no HYIPs that will ever fulfill what they promise. They are all ponzi schemes.