I don't think this requires a grand conspiracy to still make sense.

If you're an Uber employee that's been around for a while, you have significant value tied up in Uber stock. The senior management has long indicated little interest in going public, so in theory you have a lot of employees that are being prevented from becoming millionaires by their employer.

Worse, that stock is now decreasing in value (impossible to assess of course, but...) - might it not be better to leak all the things you've seen in the last few years and hurry the departure of the senior staff at Uber? Then you'll get a new set of executives who will be much more open to going public and making you rich. Maybe not as rich as you might have been before all this started, but it's better than terminal decline.