I doubt we'd get it for £15 as the full price for MAX as it is advertised as £30.
But I have a proposition:
If we paid £18 per month for MAX but paid a whole year up-front then the total cost is £216.
Compared to a 'normal' person who paid a year up front - £330 (11x£30 as they would get a month free).
That's a saving of £114 to us.
At the moment we pay £15 per month (an a monthly basis) = £180 a year.
A 'normal' person pays £25 per month (on a monthly basis) = £300 a year.
That's a saving to us of £120 (more than the MAX on the price above, so is costing IDNet more).
So can we have MAX for £18 per month if we pay for 12 months in advance? It will be £6 cheaper for IDNet.