Thank you very much for your input. And as you might have noticed, I am a GREAT fan of spending an immense amount of time in picking the right KPI’s – however; I try really hard, as in advocating, to ensure that one do not mix up traditional metrics (that certainly affect the KPI’s) and the KPI’s themselves.

That said and having in mind that we are talking about Online Social Networks KPI’s, I think the following KPI’s that you mentioned are better for particular e-commerce properties. (or this at least with my interpretation of Online Social Networks) :-)

2. Velocities (RFM+visit/purchase)
3. First purchase momentum
4. Repeat purchase momentum

BUT that the following two metrics very much relate to Online Social Network.

1. Stickiness
5. Freshness factor (how often content is refreshed versus how frequently users visit the site)

I would (and that is not necessarily the truth) probably use “freshness” as a metric in my quest for optimization on the “Visits per week” KPI.
And I think that we are most likely on the same page when you talk about “Stickiness” and I talk about “User engagement” – As I see this KPI being calculated from multiple basic metrics and that it is supposed to be VERY specific for the web property in question.

Thank you again. This is great input on a really (for me) fascinating KPI topic.

N.B.
I am very likely to get inspired by your first three metrics when writing up my “What and how to measure e-commerce websites” post. :-)

Cheers
Dennis

How about measuring:
1. Stickiness
2. Velocities (RFM+visit/purchase)
3. First purchase momentum
4. Repeat purchase momentum
5. Freshness factor (how often content is refreshed versus how
frequently users visit the site)