Under Data Charges it says:
Skinnys data rates for included data in a Skinny Prepaid Plan is calculated based on usage and charged as follows:
- billed in 5KB blocks;
- rounded up at the end of a data session or every 15 minutes, whichever comes first, and
- a minimum charge of 20KB applies.
So from that I conclude that, assuming I have a data session open 24x7 which every smartphone these days does, every 15 minutes EVEN IF I USE 0KB I will have a minimum charge of 20KB applied, which calculates to 1920KB in 24 hours or 13.44MB/week!!!!!
I've sent skinny an email to clarify on this because it can't be correct.