Not suggesting that this is the difference between it being worth it or not for an individual person, but I didn't feel like taking an Uber this time out of LAX and did a traditional cab to Pasadena -- it was $90. The Uber app quoted me at $38 and $33 if I had wanted to do pool (side note, I've ridden pool 3 times between LAX and Pasadena and not once have they ever picked up another passenger).

A savings of $50 for a one way trip is definitely at the point where the "spying" is worth it for me.

And it's not permanently. It's for a few minutes after drop off.

Assuming you trust them.