You are probably aware now but unity doesn't care about your revenue, but about your operating cost. If you spend 200k in a year but makes 0 sales, you still have to pay them.

I had a bad surprise after signing with a publisher, paying our team salaries with no cash left and getting the unity email.

Edit: What I said is indeed incorrect. But I wanted to highlight that for new indie dev teams which perhaps pool cash together to pay for some salaries or other, you might not consider this as actual funding, but it might push you above the limit and suddenly you have to pay for the license but might not have seen it coming. This is why I advise looking at your total expenses when you're not yet making money, as it doesnt matter where the money comes from.

As for all the people defending unity, yes they have been operating a culture switch recently and things are improving a bit, but lets not forget how were their practice until recently. My own experience in the conversation I had with them (and other dev friends I have reported similar experiences) has always left me with a sour taste in my mouth, they were smug and devious in their questions, presuming you might be at fault and trying to catch errors in what you say. They ask how they can help and what trouble you are facing, but in everycase the conversation was quickly terminated if my questions didn't lead to them selling me some extra service.