I will post this picture from an old thread here:
As far as I know, nearly all the breaks are in the same area and every one of them has been on a car that is lowered. Some have been tracked or autox but not all. But all have been lowered which apparently is adding additional stress to the CV joints. If you watch the above video you can get a better understanding of why that may be the case. That car is on RCE yellows with a drop of only 20-22mm (.80 inch approximately). Look at the angle of the axle during cornering and large bumps. Now think of what the angle would be with the car lowered 2-3 times that much.
This is a problem on many cars with independent rear suspension that are lowered not just the BRZ/FR-S.