Yes, but there's no reward for doing it. You don't get points or anything like that (public members/designs aren't a thing), you don't even get a sneak peak as all the designs are posted publicly (and that wasn't enough when you did get it)... really, it honestly feels almost condescending, even if it doesn't mean to be. 'Here are our designs - little people, please test them for us? No, you can't comment on them unless you've tested them - not even a suggestion. No, you don't get anything for it - the knowledge of a job well done should be enough. Recognition from us is in no way guaranteed.' It feels actively hostile to public engagement except in a very limited, almost serfish way. It's all take and no give.
I mentioned this before years ago,
here, but, as you can see, it received no response. Not one. That might be my biggest issue with VC. Any constructive criticism from has been met with, at most, what seems to amount to a pat on the head and a 'Don't worry - it's all under control, back where you can't see it'. That's where my frustration comes from - whatever people say, it's opaque and cliquey.