I upgraded my AT&T plan to Mobil Share Value with 10GB in January 2014. AT&T upgraded my Mobil Share Value from 10GB to 15GB for the same price in November 2014.
I started using CrashPlan Central for backups in December 2014. With CrashPlan Central uploads I've bumped into Comcast's bandwidth cap of 300GB. CrashPlan has good controls to manage its bandwidth usage and the initial upload is complete.