Bob,

Or do what the phone companies do. Allow free login but only during certain hours of the day. Say, after 6:00 EST. or only between certain hours of the day. Accessible but not always opportune. So new users could try out the UT much as they do now, they can post and read but can only do so within certain time restrictions. I wouldn't want to see all the free members suddenly gone. This way they get the full Free service

The problem here is that the rest of the world exists too. What may be a reasonable time frame to North America may be outlandish for other users. Let's face it, would you even try such a scheme if it meant only being able to try it during the period 01:00 to 04:00?