these numbers look incorrect. Nvidia alone in 2016 sold GPUs for more than 1 billion dollars. ut mining boomed only last year. and average price would be 258$, but you know how expensive GPUs are now.
Yeah Nvidia has sold a lot more than AMDs,GPU was designed for qualit gaming but the cryptocurrencies has dominated the gaming industry,that is why most of the GPUs today arent that cheap than before,a lot of people are buying bulks of GPUs for their mining rig like in my country the demand is very high because a lot of people are joining our community.