One of the more interesting applications of the Social Game “sticky factor” that I introduced last week is the ability to look at the life cycle of some of the most popular games and identify some of the key feature roll-outs that greatly increased engagement. The sticky factor is simply the daily active users (DAUs) of an application divided by monthly active users (MAUs).

Let’s take a look at two of the largest games, by DAUs, that have been around over three months and also have a pretty accessible view of product feature launches: FarmVille and Mafia Wars.

For full story and analysis, plus an in-depth look at the impact of a game’s viarl abilities on churn, see the full post on InsideSocialGames.com