[belorn]

I am sure I would not have contributed to OSM map if the licensed allowed google to just take everything.

That would be me working for google for free, and I value my time more. It is enough that my tax money goes to make maps that google later buys.

[dllthomas]

For what it's worth, I probably would have contributed if it was not share alike. That said, my contribution was minor and I think keeping share-alike is the right move.