Denmark plans to restrict social media use for young people

>a new “digital evidence” app, announced by the Digital Affairs Ministry last month and expected to launch next spring, will likely form the backbone of the Danish plans. The app will display an age certificate to ensure users comply with social media age limits

Ok, what qualifies as "social media" and how can adults bypass this to not connect their real identities with their online accounts?

The article doesn't address this, but addresses some weak argument that says this law infringes upon the rights of children, an argument most critics don't make.

I'd also like to know who developed this app. There could be some serious financial incentives to push something like this.