That's exactly why Blizzard is working on a mobile version of WoW, that's exactly why they made a mobiel version of Hearthstone, and that's why Riot is porting their games on mobile too 300-400M/quarter is nothing compared to what others are doing on mobile, and it is a strong IP with a dedicated playerbase that grew with the game

"In the first three months of 2022, Genshin Impact raked in £450million from player sales"