Offset is an internal wheel measurement from the centre line to the hub face.
It can either be positive or negative.
So far all the posts on "offset" show cars with wider track or wider wheel fitted to a "normal" hub. NO real significat offset change as far as I can see.
Traditionally casr were built with standard rims and when going to race rims they would have large offset rims made available as going outward is easy, inward hard
From what I see in the 3 above in #29, is not "offset", just oversized rims that then have undersized tyres fitted so they can look the way the owner wants. Heaven forbid you would try to drive those quickly
I think you mean wider "track" wheels