Follow-up from "Add bonus trial to wallet priority list"

The following discussion from !14450 should be addressed:

• @vij started a discussion: (+1 comment)

  non-blocking: I wonder if we need to consider re-numbering all of the priorities so that we always start at 1 instead of 0? non-blocking as I guess it's easier to address once we're no longer feature flagging this behaviour 🤔