No, I never saw those, and never got bonus miles if I missed an upgrade.
You must have better luck with upgrades than many Platinums in 2008 and even 2009 or perhaps DL didn't think you deserved any bonus miles unlike a lot of other Platinums who missed upgrades.
You can see it now in the following which shows up on "delta.dumb" as:
Non Air Activity Bonus: No Upgrade Email - 500 Bonus"