Whatever devs may think about some customers...
... still the "worst" customers are the not- buying-their-products-customers.
So devs should appreciate every single one who bought a plugin from them and should show that via adequate reactions if they like it or not.
In my experience some devs maybe talented programmers and therefore some kind of nerds in a positive way. But that doesn't consequentially mean they have experience in doing reasonable business too.
Due to the lack of some distance to the things, some of them sometimes can't handle honest and critical feedback and if that is so they become standing in their own way... and in result standing in the way of their customers needs. I guess it's relatively simple explainable. They maybe to involved with their products, as creators they may think that the plugins are a part of them and when such a thing is criticized they can't separate it from their own, the "me" "mine" and "I" imagination/ illusion.
We have to be patient with such kind of devs. They have to learn to improve on that aspects and grow into business service mechanisms. Such a process can take years for some and some maybe will never understand. but fortunately those described are only few.
I made very good experiences and with some I am even in an pro- active state of contact/ exchange. These are the ones it is really worth to invest in their business...if you like that expression.
A general note to KVR.
There is so much emotional content here and often times without deep positions and when you ask those posters some targeting questions... The result in most cases is...no answers any more. I recognized that so often in KVR. Is there a reasonable explanation for such a behaviour? Are there some unspoken rules for such in some counties outside Germany? I don't know but I am a curious observer and I am generally interested in learning about such structures.