Posting a Loan Request without any Collateral is something that will not work.
Especially when you ask BTC to use them in a HYIP scheme. I suggest to lock this Thread and don't expect to get anything.
By the way, why someone to give you his funds if he can do the same without you in the middle?
I have some collateral available, not sure what you mean by HYIP scheme.
Lock Y?
To answer your only clear question, Reputable sites will not allow you to create multiple accounts, which limits a person from earning double interest on any particular site. I'm offering access earn more interest than what they are currently earning.