Looked up the history and they bought it so early on that effectively the whole thing was developed by Google.

They bought the startup in 2005 and the first phone came out in 2008.

This bit me too.

How I believe you would read it for posts, using the values you posted, is “6 posts are allowed every 600 seconds”. The variables are poorly named IMO.

Following those rules, my own application seemed to stop getting rate limited.