Klout also realized it would never have the granular level of access to the interest graphs on the networks it was - pardon the expression - leaching off of.

I remember a senior Twitter staff member pointing out that if Klout really proved a market, they could simply compute all of this information directly rather than inefficiently via the API platform and firehose - with better results from access to more data, and the ability to sell directly to advertisers who they already had relationships with through their sales team.

Klout were never going to gain the level of access the needed to the graphs on the various networks they utilized in order to realize their longer-term goals. Which, btw, ultimately highlights yet another fallacy of the platform economy.