As well, an agreement in principle may involve collateral in cash, and/or property, and/or stock held in a "type of escrow" as a show of good faith, which is the precursor to a formally signed contracted agreement. When inked the escrow is transferred.
The Russian deal was an LOI....no money was transfered to move it from an LOI to a binding agreement.
The Tao deal WAS an LOI.
It ain't no more.
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Before dawn there is darkness.