MINNEAPOLIS – Piper Jaffray Companies’ 30th semi-annual Taking Stock With Teens survey highlights spending trends and brand preferences among 9,400 U.S. teens across 46 states. And according to the Wall Street Journal, the survey may reignite the debate over teenagers’ use of Facebook.

The survey found that one-third of American teens say the photo-sharing app Instagram is their most important social network, followed by Twitter and Snapchat. Only 15% of teens surveyed cited Facebook as their top social network.

Facebook, which bought Instagram in 2012, has grappled with its relevance to teens since 2013, notes the Journal, when the company told investors teen usage had declined. 

The social media findings were part of a broader survey of teens’ attitude toward consumer brands, including apparel and electronics. For example, use of Amazon increased mindshare to 38% of the overall votes as a preferred website, while Amazon Prime membership expanded 400 basis points versus just six months ago.

The Journal notes that the findings support the view that younger users are less engaged with Facebook and prefer alternate sites. However, a Pew Research Internet Project survey released in the spring showed that Facebook was used most frequently by U.S. teens between ages 13 and 17, followed by Instagram and Snapchat.

Although a 2013 Pew report showed that teens were growing increasingly frustrated by the presence of adults on Facebook, few teens actually abandoned the social site.