FlatCapper that's just an assumption. Maybe you're right. I doubt we'll ever find out, as that kind of information is usually kept close to the collective chest of the club and shirt maker.
With respect to your second para, then I feel that would show the naivety of the purchaser - the club has released three, sometimes four shirts for the last few seasons now. We're also still in November! ... If people are willing (and/or able) to snap-purchase a shirt within days of it being released (bear in mind we don't know the release dates beforehand) then it kind of flies in the face of there being a cost of living crisis - unless they're forsaking food/fuel to purchase the shirt, and in that case then they should maybe re-think their life choices.
I've waited. I'll buy the third shirt, even though I quite like home and away (in that order).