I really believe that most people don't notice, unless you specifically need the "extreme" speeds that some microSD manufacturer offer.
I think the user journey is sort of like:
- oh let me search for a portable SSD drive with a lot of space
- wow, this one is BIG (1TB!) and costs less than Samsung ones; well who cares, even if it lasts 2 years, it's still 1/2 the price
- buy it
- be fine with the no-brand
- write a great review where you think you got a great deal and you're smarter than those who pay so much for the same size (hahah!! lol!!)
and the irony is that it might indeed last 2 years before they find out that it's BS :D