That 1.7 billion probably includes anyone has that has played Solitaire on their computer once in the last year. I doubt even 25% of that are gamers that play GPU intensive games.

The 1 million crypto miners on the other hand are devoting at least 1 CPU/GPU to mining 24/7.

A very large portion of that number is phone gamers. Over half iirc. And nobody in any part of the gamer group is gaming 24/7.