No. I can't name a source though. Basically Microsoft was hemmoraghing money on this unit and Uber took a chunk of staff, the tech, AND the operating expenses.

$1 doesn't make any sense. Perhaps you're leaving out some form of equity swap. Bankrupt companies get purchased all the time for millions of dollars and I can't imagine Microsoft's business team would allow such a shitty deal.

Bankrupt companies also routinely get purchased for $1, with the old owners just glad to get rid of outstanding liabilities.

It only makes sense if the unit was hemorrhaging money and had near iron clad contracts/termination penalties.