Mike from Cutech support.
The reason for the 10 packs is simple. Cost. Since we only have 2 styles of machines, requiring either 12 or 26 cutter tips, there is no common denominator.
If you look back at other helical style machines, such as the Steel City planers and jointers, you'll find not only cutterheads with 12 or 26, but also 16 , 30 , 32, and 40. Still no common denominator.
The supplier of the tips, who also provides for other labels, feels 10 is a number that works for everyone. If it were specific to a machine, you and us had better be prepared for shelling out more $.