Here's a pic of a drift car with rear, positive camber:
View attachment 1180570
.....but again, we're talking positive camber being used in very unique scenarios and the above is probably a more extreme example in an application beyond just some trend for aesthetic reasons.
Even the example someone else gave about "many" factory cars commonly having
some positive camber but even in those situations it's usually ever so slight (likely imperceivable without measurement). ....and those are vehicles that will be typically be driven on highways, on commutes, etc.
The OP is talking about extremes here though and beyond drifting, oval track, off-road and early race cars, I just don't see the point in this game considering the majority of the applications (e.g. GT and track car racing) as I mentioned earlier. ....unless of course they are talking purely for some sort of aesthetic reason like the under glow lighting which is not my thing (even in this game) but to each their own.
In either case, I think the OP actually meant to say extreme negative camber, not positive.