99%* of freestyle skates have cuff mounted on two rivets/screws and they work well enough. Salomon cuffs works good with or without this additional bit of plastic - as Doug said, it breaks sooner or later anyway. So don't care about it.
*obviously this number is made up, but besides many Korean cuffless freestyle skates (which aren't available outside Asia), only ones with something different than two-point mounted cuff are KSJ II and Trix. Also USD Imperial if someone wishes to convert them to freeskates with UFS frame. So it isn't far from true.