You don't have to guess, their numbers are public. In 2020 they made $40B in profit, so it takes them about 27 minutes to make $2M in profit.
That's an odd way of phrasing things. If Wikipedia were to take away free access to their data, Google wouldn't be dropping Wikipedia, Wikipedia would be dropping Google. This line of thinking "you took this when I was giving it away for free, but now I want to charge for it, so you are expected to keep paying for it" is incorrect.
Then, after two or five years, let it fester then abandon it. Nobody gets promoted for keeping well oiled machines running.
It was actually good for writing stuff when I tried it. Never brought in enough traffic. Killed.
Google isn't a sponsor of Mozilla, they're a customer. Do people think Google is "sponsoring" Apple with $1.5 billion a year too?
The cynic in me thinks the product is anti-trust insurance.
These are two very different companies with a very different relationship with Google. And very different influences on Google.
Google wants to be on iOS. It brings customers to Google. A lot of them. iOS is possibly more profitable to Google than Android even with all the payments Apple extracts from them.
Google needs Mozilla so that Google may pretend that there's competition in browser space and that they don't own standards committees. The latter already isn't really true, and Google increasingly doesn't care about the former.
2 mln is probably Google's hourly profit. For that they get one of the biggest knowledge bases in the world. It's basically free as far as Google is concerned.
The instant Google becomes confident they can supplant Wikipedia, they will.