I see no ethical problem with Google ads being on the site. We all know that hosting costs money, why shouldn't a small amount of money be recouped from advertising?
The busier the site gets, the more Google clicks but also there will be more bandwidth charges (generall speaking) so it evens out a bit.
The busier the site gets, the more Google clicks but also there will be more bandwidth charges (generall speaking) so it evens out a bit.