Yep. You just get bigger much, much slower. But if you hate that heavy or bloated feeling/look from eating above maintenance calories, it’ll work.
I use Mag-10 as a way to increase volume while having calories close to maintenance. GVT + cardio every session would be overtraining if not for the Mag-10 and that I get plenty of calories from carbs during the 2 hrs after my workout. During a 2 week cycle you can lose a significant amount of fat while adding a bit of muscle.