Earlier this week, BuzzFeed News published a report on shady knockoff clothing manufacturers who advertise their goods on Facebook. Now the site has responded to the report, and vowed to take measures to clean up its advertising.

“We understand the gravity of this issue and we’re taking it very seriously,” Andrew Bosworth, Facebook’s VP of Ads and Pages, wrote in an email to BuzzFeed News. “It’s a complex problem, but we are working on it and will do everything we can to make sure people trust and enjoy the content they see on Facebook.”

Many of the scam ads feature photography from other brands and advertise goods made by an assortment of Chinese companies all owned by one of the country’s richest men. Experts have called on Facebook to police its ads better or introduce new metrics to filter out spam, like how Google’s AdWords looks at various data points to judge a company’s quality.

“I remember the days of the spam and the porn and all of that stuff that infiltrated our Facebook feeds or ended up on our walls and they were able to crack down on that,” said Chris Tuff, director of business development and partnerships at ad agency 22squared. “Now they have to catch up to what’s happening right now.”

Until now, Facebook has been fairly lax on advertising as long as it met the site’s preexisting rules and standards. However, this controversy may force the site to reconsider what kind of ads it allows.