Actually such "interaction" metrics are only useful if it is proven that they ultimately lead to increase in site objectives (notice I didn't say sales). Increa

Actually such "interaction" metrics are only useful if it is proven that they ultimately lead to increase in site objectives (notice I didn't say sales). Increase in interaction will be much stronger data point if you analyze the historical data and found that correlation of interaction per user and site goals (sales) per user is positive and high. No point enjoying the increase in pageviews if it in no way affects the bottom line. This is generally what happens with sudden bursts of traffic from Digg, Reddit, etc. While traffic increases tremendously, the conversions (not conversion rate) remain the same.