I'm not an economist or accountant so take this with a pinch of salt, but this basically transforms Amazon money into datacentres with a guaranteed customer. That's your profit right there.
The US is very rich, but Europe is not poor. Europe is richer than basically anywhere on the planet _except_ the US. Like even compared to Canada or Japan, Europe is (generally) as rich or richer. Poland just overtook Japan in GDP per capita! Both the UK and France are richer than the oil-rich UAE.
I mean on an absolute basis the average European enjoys a very comfortable quality of life and often a better work life balance then most in the USA.
That said in the context of this thread on why countries seem to bend over backwards for the "privilege" to sell to the USA it's because everyone is shockingly poor by comparison.