It's not even that complicated. Tracking, Still Hunting, Hunting on horseback...atop Elephants, Hunting from canoes.....hunting "mobile" isn't like a new thing at all. Used to just be called hunting.
It's actually a bit comical to me that the "mobile hunting" moniker is associated mostly with ambush techniques...aka...stands and saddles. Moving around from spot to spot sitting on logs, stumps, rocks, or the ground is a more mobile approach.
Hunting off a bucket is more mobile than "mobile hunting".
"Mobile hunting" isn't a hunting term, it's a marketing term.