They have been scattered all over facebook and trying to get 1 victim even for just one day.
I really think that the people spreading HYIP links all over facebook aren't the people behind the HYIP site themselves but the people that want to get money from the referral program.
No one can stop them. One could be banned then another one comes out. It is a non stop scamming purpose.
You can't even "ban" a website. The only way for an HYIP to shut down is when they decided to. They can continuously pay and people will continuously come in as well. But when they decided to stop paying out, that's the time when people would stop investing. After this, there's already a new HYIP site owned by the same people growing somewhere else.
The one behind this should be imprisoned.
That's very unlikely. Supposed that you get the whereabouts of the people behind it. Would you go to a different country, hire a lawyer, and sue them just because they scammed you about $5-$10? Of course not.