Now that I have signed up for the upgrade from PP to Polaris for two, what are the likely chances to get upgraded? Right now the Polaris seats show more than 9 available for the 2 main flights, but the PZ/PN show 0. However, I've been checking these same flights on UA's sites where they show standby's and upgrades they process and have seen anywhere from 0-8 seats getting upgraded.
Flight UA5 - 10/12/22
Flight UA952 - 10/22/22
For example, a UA952 flight today had 4 upgraded to Polaris, and only 1 upgraded to PP.

Either way, we are fine with PP, plus we can help contribute to this very helpful forum with a review of the PP bulkhead seats one way, last row seats on the other flight.
If it helps, from the receipt, UA5 is fare class A, and UA952 is fare class O.
Thanks!