The nice folks at Fitbit sent me a badge today. Or perhaps that's the Fitbot folks.
My preference - and perhaps this is a very personal preference - would be for Fitbit to tell me when I hadn't made the target and for reminders such as "that's 3 days out of 5 you haven't made the target" to get ever more intense and spur me on that way. The on screen message "Yes, you nailed it" really doesn't do anything for me.
I'm the same, work or play.