10. The method of claim 1 , comprising: logging a second set of actions of a second user within the social network of the user; categorizing the second set of actions into a second set of interest categories; weighting the second set of interest categories to generate a second set of weighted interest categories, the weighting comprising: for a second interest category associated with a second subset of the second set of actions: identifying one or more types of actions associated with the second interest category, respective types of actions associated with an action weight; and assigning a second weight to the second interest category based on the one or more types of actions associated with the second interest category and an action weight associated with each of the one or more types of actions; and calculating an interest social index for the second user as a function of the weighted interest categories.
10. The method of claim 1 , comprising: logging a second set of actions of a second user within the social network of the user; categorizing the second set of actions into a second set of interest categories; weighting the second set of interest categories to generate a second set of weighted interest categories, the weighting comprising: for a second interest category associated with a second subset of the second set of actions: identifying one or more types of actions associated with the second interest category, respective types of actions associated with an action weight; and assigning a second weight to the second interest category based on the one or more types of actions associated with the second interest category and an action weight associated with each of the one or more types of actions; and calculating an interest social index for the second user as a function of the weighted interest categories. 11. The method of claim 10 , comprising: calculating an influencer social index for the user based on the interest social index for the second user.