baldur , 
“WSJ: The AI industry spent 17x more on Nvidia chips than it brought in in revenue”
Linking to a reddit thread just for the headline quote they found in a paywalled WSJ article feels a bit weird but…
This 17x number is just for chips so the actual cost x revenue multiplier is much higher in reality https://old.reddit.com/r/MachineLearning/comments/1bs1ebl/wsj_the_ai_industry_spent_17x_more_on_nvidia/