Some people take games seriously and they want to make sure their dice are fair and balanced. I think they would want certified fair dice. Certifican could be accompanied by a video showing 1000 (or 10k or whatever) roles and statistical summary that all numbers are equally likely.
The rolls could be done via Robot, and unfair dice could be sold via as "normal" dice under a different brand to recoup cost or recycled.
I think the main problem isn’t producing fair dice, but preventing people from switching them for unfair ones.
Because of that, I don’t think selling dice that look just like your fair dice, but aren’t fair is a good idea.
What you need are WiFi dice that pass all tests, and when used can be 'adjusted' Maybe that is why dice are transparent as well?