Its a two wheel drive!

[grantoury]

Only found one ebay find on RB besides this one.

https://www.marktplaats.nl/v/fietsen-en-brommers/fietsen-mountainbikes-en-atb/m2137600998-bwa-traxx2

 

[bikeworkshop]

we owned one of those.
Awful.
Freak value only - the 2 wheels of a bike go at different speeds round a corner after all, and it feels like stirring porridge.
Additionally you only usually lose traction on the front cornering or braking, so there's no problem this can solve!