Uno millis() falls behind over long periods (hours/days)

What has always mystified me is where the almost good clones come from.

Does someone be grabbing chips from bad manufacturing runs that sorta work but not if you shine a flashlight into every corner?

Seems like crooks go to more trouble than it would be to just run an honest business.

Not being much of a crook it is hard to say what the motives are.

a7