Not a dark pattern, an accidental leftover string from our testing. Any account registered before today qualifies. I'll deploy a fix to that shortly. Update: deployed, although you may need to restart your app to update the text.

Sucks you had the sign up date prior to the announcement. When I read the announcement I immediately signed up for a keybase, HN and Github account and then find out I cant be included because I signed up on 9/9/2019. You would think that would be the incentive to at least give a little buffer for people to join in that were not aware.

It let me sign up with this new HN account, but I'm also getting the 3 devices block.

You can generate paper keys in the mobile app. They count towards the device count.