Very simple, since uplink providers do not provide rollover commitments, unfortunately. A rollover business model 'might' work on very small commitments, but definately would not work on large commitments.
No one wants to touch it because they will get sued by ATT for using that term Rollover
Hahaha was thinking the exact same thing! It might work for the wireless industry but not the web hosting industry. I don't have AT&T so I don't know exactly how it works but imagine if someone had 10TB of bandwidth, didn't use anything for 6 months and suddenly used 60TB that month. Ouch. Not a smart or fiscally responsible way for a data center or hosting company to operate I am afraid.
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