Wojcicki Foundation has donated USD 500,000 to Wikimedia Foundation.
This donation is unusual because the foundation was founded by none other than Google co-founder Sergey Brin and his wife Anne Wojcicki.
Some people would say that this is an indirect way of Google funding the Wikipedia project but there is nothing wrong in it.
Wikipedia accepts open donations from anyone and are currently going through their yearly cycle of seeking funds.
Wikipedia does not run ads and is totally dependent upon donations for its running.