I stuck around for the initial posting (full checkout and self-checkout) and second posting (pick-up). Not sure if there was ever a third posting, but assumed it was done after the second.
In my area, saw competitor shops for the in-store this round, but no competitor shops for the pick-up. I think this period has been the quickest I've seen the shops fly off the board.
Not sure, but for competitor shops in my area, it looks like they only choose certain locations within a close proximity of another established Kroger.