I perused the forum and couldn't find an answer to this question, so apologies if it does exist somewhere in the previous 99 pages.

I have an upcoming trip (MSP to PHX) and applied RUCs. No inventory currently available so I wait-listed them. Here are my questions: when the complimentary upgrade window opens, would they first clear my RUC or would they clear DMs & others with higher priority on the underlying fare? And would they complimentary UG me at all since I have an UG in the RUC inventory bucket? I've seen that people remove their RUC when the window approaches and then reapply them, and so I am wondering if that's just to see if they can get the freebie or whether having the RUC applied screws with one's priority & ability to get a complimentary UG.