This.  Recently I did a poll of several of the PPT operators and some of their larger customers and there was not one single person willing to put in one additional bitcent of new money toward recovery.  Almost all of them replied that they would happily pay a percentage of whatever is recovered to whoever recovers it.

The thinking is that there is really no way to recover whatever is left anyway so why throw good money after bad.

What does anyone have, really, in the way of proof of debt or contract?  A typical direct customer or PPT operator has two Bitcoins addresses:  a deposit address and a withdrawal address.  The difference between the two amounts is the "amount owed" (writing off all the bogus interest accumulated).

Now two somewhat arbitrary Bitcoin addresses, and the difference between them does not constitute much of a contract or collectible debt in the real world.