Actually you are incorrect:

Check the "Mopar Supercenter" site....
SRT8 Spoiler:
This is an original replacement spoiler offered by Dodge.
#1GL20RXFAB, Matte Black includes SRT8 emblem

On the "Late Model Restoration Supply" site....
SRT8 Spoiler:
#DCP-82211606A, 08-09 Factory Rear Spoiler, SRT8 Challenger, with Emblem

As you can see, the emblem is included, so like I said, perhaps he just didn't want to remove it for some reason.........