Hi Nadeem
You're correct that under limited terms for some use cases you can
'use' the map data you have given to Google. However, it turns out
there is about 30 years of debate on this topic of licensing and what
is better, stretching back to Richard Stallman. It turns out that you
get much more rights and access (as does everyone else) if you join a
true open project like OpenStreetMap than Google Maps.
What I'm curious about is the motivation for people to remain here and
help Google meet their Q2 revenue forecasts, rather than to join truly
reciprocal projects. Is it simply a matter of better user experience
and access to aerial imagery with Google Map Maker, or is there a
deeper warm feeling or other motivation? I would probably add my
street in to Map Maker if John Hanke gave me a biscuit too, and there
is a clear commercial motivation behind many people in OpenStreetMap.
The difference of course is that there is an ecosystem and a level
playing field in OSM that is lacking within Map Maker.
Best
Steve