The nonprofit news watchdog Media Matters for America documented in a report published Wednesday that ads for a host of mainstream brands have been run on the account, which has shared content celebrating Hitler and the Nazi Party.

Ads for brands including Adobe, Gilead Sciences, the University of Maryland’s football team, New York University Langone Hospital and NCTA-The Internet and Television Association were run alongside tweets from the account that had garnered hundreds of thousands of views, CNN observed.

But Wednesday’s report suggests that the company still has work to do if it wants to avoid monetizing, and placing ads alongside, objectionable content.

“Media Matters and other observers have documented how X has remained a dangerous cesspool of content, especially for advertisers,” Wednesday’s report states.

Media Matters says it has also documented instances of brands’ ads being placed next to content from Holocaust denial and white nationalist accounts.