TailScale is a VPN, and the article highlights a recent increase in user base. This is likely due to VPNs being required to access pornographic materials for residents of many US states.
Notably, it's a VPN for connecting your own devices together, so unless you're deploying a server elsewhere for access to porn it's probably not for that.
It could also be that Tailscale users have many kids, who then also use Tailscale. Although if the header is meant to represent that, it's showing the wrong position.