These cars are not mainstream and are typically used to circumvent vehicle classification regulations.

"Used to circumvent" translation: the laws are stupidly restrictive so they're normally (pointlessly) illegal. And the reason they're not mainstream is because they're illegal.

Kei truck and the Maverick aren't even in the same universe of size comparison.

A kei truck will give a VW Golf a run for it's money size wise!

the maverick is a few inches shorter than the ranger. it’s huge.