That’s exactly what’s at the core of the request — if it was some rich friends of SBF, maybe they’d be happy to gift him the money — but the requirement is that

That’s exactly what’s at the core of the request — if it was some rich friends of SBF, maybe they’d be happy to gift him the money — but the requirement is that the invidividuals providing the sureity be sufficiently at arm’s length that they would be able to influence him not to flee - so that they could get their money back. For all we know at this point, they could be co-conspirators.