In my long and varied experience in tech support and customer service, the number of people that take the time to make complaints are much higher than those that take the time to provide praise.
It is just one of those givens in any industry.
Using the number of complaints found in a forum or two to say there is a widespread problem with a product is, in my opinion, foolish and just plain irresponsible. Especially when you do not even have experience using those products.
Just my $0.02.
30 is a bit extreme.
But i know some forum does require at least 3, 5, or 10 and above to make sure you can post.
Especially when the moderator start to notice spamming, trolling, etc. becoming rampage on the forum.
Complains are almost always done by the vocal minority, and in this case, vocal minorities who are not familiar with how crow funding project works.
As for failure rate vs review rate.
let's look at it from the Geek Out campaign.
Was there glitches and bug being posted and discussed? Yes.
Was it many different ones? No.. no really... often the same bug or the same person posted on different forums.
Now let's look at the amount of Geek out shipped vs. reviews.
Was a good sized amount of them shipped? Yes.. Perhaps in Thousands, but how many actual review write up do we have?
oh yeah....on this site/forum. 2, and a few there and here on major audio sites.
I'm sorry, but assuming the product is having high failure rate by comparing reported failures vs review is not in anyway, shape, or form an accurate estimate of products's actual failure rate and quality control.