Free Rice - Where is the curve headed?

If you like exponential curves you may be interested to check out Free Rice . It is a test of your vocabulary and will contribute rice to the World Food Program thanks to some very low impact advertising.

I heard about it on November 13th from Anuj Goel (check out his blog) who recently created a platform for collaborative groups to trade services, products and event details. VERY useful for everything from clubs, church groups and small business customer service groups to in-house corporate bulletin boards.

The growth curve on Free Rice has been interesting to watch. On November 13th it had been active for a little over five weeks. The peak usage was November 20th. A few days ago they doubled the number of free grains of rice per correct word - maybe to move the curve up since it has essentially flat-lined for the last two weeks.