I am not sure if you are calculating this correctly but for me, 70 cent/TB/mo is not a realistic number. Cheapest glacier storage for me, is, $0.004 per gb per mo, which makes a terabyte storage for $4/TB per mo.For me, this number is at Ohio or Oregon data centers. And their retrieval rates are super expensive, as in, $0.03 per gb. Glacier might be cheap but it definitely is not the cheapest.