11/15 $25 Uber cash, meter never moved, never credited.
11/15 $25 Lyft cash, meter moved a couple days later and credited 11/20.

I have now done multiple Lyft cash transactions of $25 and they all get credited a few days later. Appears Uber cash may be dead at this point. Not worth it to me to open a ticket or anything, especially this late in the year. Will update if the meter ever moves for the Uber transaction but I'm not counting on it.