Originally Posted by
gfunkdave
Apparently it is a new bug where the website won't show upgrade offers if any segment on the itinerary is not eligible for an upgrade. This is what the r/unitedairlines subreddit says.
I don't think that is true. Also, you don't need remove yourself from the WL to get UG offers - you can simply call for pricing. Doesn't work online and also often doesn't work after removing a previous WL.