my history Regina ORO, Suntour New winner Pro, Sachs Malliard ARIS,
and what shimano freewheel I could get in a big enough low ratio, on.

none of them failed.. Ive never seen one of those ^^^
in any bikeshop I've been in, working, in the last 40 years.
And I've never heard of "LONG YIH DNP".. no history..
you got a real wholesale distributor resource
that you don't have to bid to get some.?

FWIW a cog driving on only 4~5 teeth won't last long. vs 6 or 7
(half of total teeth)