So on the GG Racing models that ship now, they come with a bearing cup in the throttle side to prevent that bar-on-handlebar drag you'd get when doing anything where you're putting a lot of pressure on the grips. It's a nice feature, but if you want to keep it, you can't run bar ends.

Curious if the Vertigo has anything like this on the throttle side?

Nothing on the Combat or Ice models.

Apico do one that is integrated into the tube. They call it a Throttle sleeve and it's available in Black Slow and Titanium fast versions.