[OSM-legal-talk] The big license debate, correction

[OJW]

> And the only situation it would be required is when someone wants to use 
> an OSM map without contributing anything of value back to the community. 

Wrong phrase there - replace "use" with "publish" - obviously freedom to use 
the data is very important.  But for publishing, the sharealike is a way of 
repaying people who created the data, by allowing them to copy things made 
with the data.