Because the site is too expensive to run! Wait, what do you mean it's worth at least six figures? That's not enough to pay employees though! Invasive ads are the future!
The site would either be just as bad or better under new ownership. I don't want to risk damage to the Admins, who clearly work hard with the scraps they're seemingly given, but I'm surprised ioi hasn't just cashed in and sold it off by now if he's that hesitant to keep an easy moneymaker site running. It's not like the charts were ever that accurate anyway.
You should check out my YouTube channel, The Golden Bolt! I review all types of video games, both classic and modern, and I also give short flyover reviews of the free games each month on PlayStation Plus to tell you if they're worth downloading. After all, the games may be free, but your time is valuable!