Scastle, I have never disagreed that the 5% using 67% isn't ideal for any company or product. Economic viability of such I cannot comment on as I haven't got the figures but common sense says no it's not.
Ianathuth, nice page you decide to choose
. Expensive over usage charges BUT charges are only incurred during peak periods. Nice solution IMO to the whole overusage issue. At peak times you are capped but at night and during weekends DL's are unrestricted.