gzt: I don't understand why more ISP's do not offer pure per gb pricing.
I also don't understand why this per gb price does not automatically reduce as the data use goes up. It is not as if someone using 300GB requires 100x the support as someone using 3GB.
I imagine Ragnor's post above influences this. Additionally a lot of ISP's are frocusing on the large mum and dad with kids market not the lives and breathes technical market for which the per GB pricing is often ideal.
Having supported customers on plans where their data can run wild I can tell you bill shock for run away bandwidth is not unusual where as here I'm sure the bulk of usesrs can account for and control their bandwidth use.
As much as we are happy to sit here and say the customer needs to be responsible for their use the reality is this generates bad feeling for the customer towards the ISP. Sadly not having per GB plans easily available to customers may have a competitive advanatage associated with it.