Ok, and what is you point? The app I use is under 10MB and the data under 1MB. I do not know how can a log of calls and contact list be over 500MB. Another app I tested 18MB and 200KB of data. So you either have a contact list over 100 000 contacts or google contacts is abnormally huge. In the end is still 5-10x the size of alternative contact/dialer apps.
They know some people can’t afford it, they just do not care.