This practice, at least with respect to the CDS, was consolidated relatively recently. The figures for the two years spanning the change show its effect on reported standardized scoring ranges:
Fall 2016
SAT Middle Ranges, 54% submitting
CR: 650–750
Math: 640–760
Combined: 1290–1510
ACT Middle Range, 44% submitting
30–34
Fall 2015
SAT Middle Ranges, 42% submitting
CR: 680–765
Math: 685–770
Combined: 1365–1535
ACT Middle Range, 36% submitting
31–34