They sound great broken in but some might find them harsh if for example you're used to C Rex dull tone.You mean the red Fang stays harsh even after break in? Or it's only harsh when new.
I'm curious since they have some serious dB age in the upper frequency range. Past the strings and into harmonics. Perhaps that's it?
We might have a strawman here. Which speaker company or reseller is charging a premium to break-in a speaker?I think I remember one speaker company offering speaker break in for an additional fee.
Sounds like a racket to me. Charge extra to hold the speaker for a few days before shipping. Players are now demanding it (because of the internet) so it seems totally legit, and in their defense the speaker manufacturers who do so “might” be unaware that it’s a myth.