Google did negotiate exactly that, a lower rev share than Microsoft would have to pay, according to Microsoft. Via https://finance.yahoo.com/news/microsoft-con

Google did negotiate exactly that, a lower rev share than Microsoft would have to pay, according to Microsoft. Via https://finance.yahoo.com/news/microsoft-considered-investing-billions-apple-152400397.html https://finance.yahoo.com/news/microsoft-considered-investin... > Because Bing was far smaller than Google, Microsoft would have had to offer Apple a far larger percentage of the revenue than Google and would have lost money on the deal, at least initially, Tinter said.