OK, I see now that Yahoo is still making money, though it's been declining. They're now at just under 2 Billion in annual revenue. That's surprising!

They look to be little more than a news aggregator at this point, so it's just eyeballs from the inertia of users' force of habit to use Yahoo?

I suppose this gives a "life span" of, at most, a few years before the lights get turned off at Yahoo.

Yahoo Search is a massive search arbitrage business. Look deeper and you'll see a ton of revenue and profit. It's just a grimy business.