Really great article and very refreshing to read. We recently adjusted the pricing on one of our services http://www.advantly.com to include a lower price monthly package and 2 other value added packages that require annual subscriptions. It has proven to be successful for us and the subscriptions to our annual packages have increased.
One thing I found really confusing : On the gold package what does select features mean ? What can I select ? ( I later realized that it's the select package features but it took me a few minutes :) )