I have hard time understanding why won't they just create a set of keys that include all special ISO keys and sell it separately. I wouldn't mind even if it costs double since having doubleshot PBT makes the set last far longer time. I can't believe it wouldn't turn profit if they would price the individual keys triple compared to your standard set.
I read that comment as: you have a hard time understanding supply and demand?
That's quite a stretch. It's obviously out of the question to produce full sets for each ISO region, but if they produced somewhat overpriced sets of all ISO caps it would: increase their overall sales by a large margin even for the standard sets due to increased customer base AND increase the brand exposure for their products in ISO regions.
The sets are already being made for the Pok3r which includes every single one of the non-standard caps, hence the production line is already in place and would need exactly zero investment to build.
I was unaware that shine-through caps are available for ISO layout RGB Pokers. I have only been able to find ANSI-specific caps.
In any case, the market for people who actually bother to change keycaps is exceedingly small. Much smaller than most people here would estimates (we are all surrounded by a filter bubble of keyboards enthusiasts here, it is the entire point of this forum after all).
What most people don't realise is that while you may think there are good demands for custom keysets, a few hundred units sold one way or another means absolutely nothing to manufacturers. Unless the market is there for thousands or tens of thousands of units sold, it is unlikely to even make a blip in the radar of medium to large companies. Having an extra SKU to worry about, along with all the supply chain considerations along with it (another item to have in your stock management) for a meagre few hundred sales doesn't make sense.
Just look at GMK Carbon, arguably the best-selling GMK keyset in recent history, with 2k+ order sold. The (mostly) fully featured International add-on is currently available for a very reasonable price point, and currently sits at 36 orders.
Most SP group buys I have seen or participated in so far has sold meagre few units of their international child sets (usually in the low tens of unit, single digit in some cases), and has struggle to meet MOQ for those specific child sets, even on wildly popular SA groupbuys.
I keep saying this, but the demand for this kind of thing just isn't as high as you think it is.
Edit: Having that said, there appears to be an EU vendor selling pre orders for ISO-specific shinethrough kits for the Poker, buy up before they sell out folks