Economist's conversion process

The Economist has an interesting conversion funnel: non-logged in readers can read 1 ( perhaps 3 ) articles for free, while logged-in readers ( non-paying ) can read up to 6 articles per week. Here's the sign up flow:

Step 1: Alerting readers that they have reached their limit:

Economist_step1 Sex and politics: Weiner parade | The Economist

 

Step 2: The Sign Up Form

Economists_step2 Register | The Economist

 

A short and sweet sign up funnel.