I've never watched his videos but I use YT without logging in and flush cookies on browser restart. With no viewer profile, YT heavily promotes his content on the front page.
www.youtube.com##ytd-rich-grid-media.ytd-rich-item-renderer:has(a[href='/@MrBeast'])
www.youtube.com##ytd-rich-grid-media.ytd-rich-item-renderer:has(a[href='/@BeastReacts'])
www.youtube.com##ytd-rich-grid-media.ytd-rich-item-renderer:has(a[href='/@BeastPhilanthropy'])