Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
This mechanic is commonly called "proration". In addition to dissuading infinite combos, it allows hefty moves to be thrown in the end of combos without being overwhelmingly unbalancing - comboing into a super would make it generally easier to land that super, so the damage is reduced to accommodate that.
