All those organizations you mention all agree USA is still on top for nominal GDP.
I unfortunately think you’re projecting with the people getting offended bit.
So you are right with the nominal distinction, and if I was wrong about that, then the downvotes probably reflected that more than any opinion of mine.
Of course you don’t need all the people in the country to have (disposable) money since their populations are so big.
And companies like PinDuoDuo in China have shown they can become $30B public companies with a profit in 2 years by mainly targeting poorer or more rural Chinese.