Presumably the problem with all of this is that Allegris was conceived pre-COVID, in the days where corporate travel existed at a much higher rate than it does today. In those days, the seat selection fees here would be paid by the corporate, and similar to YQ, would be part of their ancillary spend, and thus not eligible for rebates like the base fare would be? Pure profit for something that's inherent in the product.
Now that corporate long haul travel is less than it used to be, and premium leisure is a much bigger factor, the uptake of these charges is going to be less than they modelled in the first place. Be interesting to see how this turns out.