The report seems to indicate the older meters would consistently under count, so more accurate readings would mean more revenue as reported usage would be higher even if actual usage doesn't change.
not sure if it under counted, when the smallest granularity is 0.5 cubic metres. Seems like it would balance out, some times higher sometimes lower.
0.5 cubic metres is 500 litres of water, that allows for a lot of variance each way.
so more accurate the better.
Will take awhile to generate revenue when considering the upfront cost of purchasing the metres, and installation costs.