Then make it 150 people. 75 for tech and 75 for ad sales. Right now it's something like 3500-4000 people working there. What do they do?
I think WhatsApp had something like 50-60 employees around the time they got acquired by Facebook. Sure the request/response ratios are different (few publishers, lots of subscribers), but at the end of the day I don't understand how you can have, literally, thousands of people to run something like that.