Purely looking on what you get (I have no idea how they sound);
Nice drivers, purpose made for the 30 and further up the range, a good, solid cabinet, decent crossover (for the money) plus nice finishing of the speaker
even it's RRP seems entirely reasonable.
https://www.qacoustics.co.uk/concept-30.html
I can see two problems. The brand will likely forever be associated with budget speakers. I believe they should have chosen to start another brand name altogether to distance themselves from that market.
Think Toyota/Lexus.
Another example of something similar are Boardman bikes, named after C Boardman. Halford bought the brand and it is now associated with mass market brands. They tried to make some more expensive Road bikes, undoubtedly good ones but I have never seen anyone with a £3k+ Boardman bike ... .
The other issue is related. Because of this folks are probably comparing this standmount with basic level floor standers from competitors such as Dali or MA at similar money or even QAcoustics own, cheaper products. In other words, they think they get more for their money. More is usually perceived as better when starting off in this hobby. Add a couple of good reviews from WH and presto, you have a best seller. - It is only when looking closer and seeing what has gone into a small speaker that was designed by someone that knows what they're doing ... the bell might ring.
Now, as I said, I have not heard the speakers and I do not want to take away anything from the other brands mentioned but I can see why this speaker might struggle in a show room. Enthusiasts likely shy away because of the name, starters are ... .