I would term "saving money" as being defined as "instead of purchasing the paper version, I purchased the eBook version instead for less".
The problem with this is:
1. Publishers have kept the prices of eBooks exorbitantly high. Higher, in many cases, then the paper version.
2. Any eBook that is contaminated with
DRM cannot be considered a "purchase" and I will not waste my money on them.
That leaves me reading many free (i.e. public domain, or author freebies) eBooks. But 99% of these free eBooks are books that I probably would have never read in the first place.
So I really can't say I've "saved" any money.
However, like GA Russell, my reading has gone up significantly.