I think for American market, the tiny ebikes are tough sell.
Most folks in traffic consider regular sized bicycles as toys, don't belong on public roads to begin with; smaller folding bikes with 20" wheels are generally not considered to be performance worthy.
Tiny sized folding bikes 16" or 14" wheels are even more rare, mostly city dwellers, living in tight spaces in high-rise buildings with limited spaces.
Took me years of commuting in NYC on a Bike Friday Tikit to realize the benefit of tiny bikes when compared to regular sized bicycles.
I hope tiny bikes become more popular in America, but gas prices would likely need to be $6/gal. before that would occur.