Razer's new mouse has a clutch for your thumb

Before today I didn't know I needed a clutch on my mouse, but now I'm wondering how I ever lived without. Razer's new Basilisk gaming mouse has a customizable clutch for your thumb. It seems to be best suited for actions that are more of a "press-and-hold" kind of a thing than a single "click" moment. Push-to-talk is the first thing that comes to mind.
Razer's default configuration for the clutch is as a temporary DPI adjustment, which is often useful for sniping scenarios — you want high