Between 2020-2021, no GG did better on Korean digital charts than OMG. They had two songs with around 1 Billion Gaon points in 2020, plus another megahit in Dun Dun Dance that was probably one of the top 15 songs of 2021. They went toe to toe with BP and probably won in 2020.
Yet for all their digital success, poor Mimi still had made NO INCOME over the past 8 years. This goes to show just how irrelevant charting truly is when it comes to our idol's wellbeing. She said the other members actually made money before her, which i'm presuming is due to their individual activities and endorsements, while she was still in the red. Only now it seems like she's finally turning a profit for herself.
Bottom line, charting is fun to argue about as fans. But the REAL money is in album sales, endorsements and appearance fees, concerts, merch, and even personal YT accounts.