Because the deal with WMIH would be better than a deal with someone else. WMILT is required to liquidate which means it is not going to get a better deal from any one else.
The big holders of escrow also hold a big piece of WMIH, so they will benefit by selling the assets to WMIH. If assets are sold to someone else, none of the escrow holders who also hold WMIH shares will benefit from it. Isn't it better for some to benefit as opposed to no one.
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