It's totally up to Google to do what they want... just like it's totally up to you to do what you want. Choosing to advertise and where, how is vital if you're concerned about what your doing just email Google. They will advise and they always communicate with us when we have a concern about something.
Google might be big brother on the web but there's other siblings out there brewing up the next new thing so they know they have to be careful not to run you off.
This was FUNNY!!
"And the sponsored links on Google search results, are... Gosh! They'd be 'paid for' links!"
Like that attitude and good to see it around
Good Luck!