I bought a MiniPC directly from a Chinese company (an AOOSTAR G37) and the driver downloads on their website are MEGA links. I thought only piracy and child porn sites used those..

I am somewhat amazed how you can manufacture such expensive high tech equipment yet are too cheap to setup a proper download service for the software, which would be very simple and cheap compared to making the hardware itself.

Maybe it is a Chinese mentality thing where the first question is always "What is the absolutely cheapest way to do this?" and all other concerns are secondary at best.

..which does not inspire confidence in the hardware either.

Maybe Chinese customers are different, see this, and think "These people are smart! Why pay more if you don't have to!".