For me it's $25 cheaper and I do not use up the 3 GB most months. So my data stash grows.

Then when I had to use up data because some of my stash was expiring, I'd have to run video or tether other devices and do app. Downloads.

Plus initially the limits on tethering on the One made it no brained to stay with SC, even though they were trying to get people to upgrade to One with free iPhone 7 offers.