While perusing scopes on various sites, I came across the Optisan CP F1 MH10 scope
www.trenierairguns.com
I don’t have a FFP scope right now, but I was under the impression that their main benefit was that the reticle size changes with the magnification. Since this is fixed power, what is the benefit? What am I missing?

Optisan Optics CP F1 MH10 Reticle | Trenier Airguns
The Optisan CP F1 First Focal Plane is the perfect partner for compact and lightweight rifles and airguns. Parallax adjustment range is from 10 yards to infinity and a 30mm tube. Springer and centerfire rated with a sleek design and stainless steel low profile turrets with 0.1 mrad adjustments.

I don’t have a FFP scope right now, but I was under the impression that their main benefit was that the reticle size changes with the magnification. Since this is fixed power, what is the benefit? What am I missing?