Money and Active Users

The following graph shows the contribution of Skype to the eBay revenue for the last 5 quarters, expressed as well in US$ as in € (euro). Contribution is basically “revenue less costs”, see one of my previous posts.This has clearly a flattening tendency.
The same number expressed per User Account is even worse:It has a downward tendency, although, according to Skype the user base has increased with 33 million! Pity that they only report the number of registered user accounts, and not the active users.
User accounts includes also the multiple accounts of one person, the accounts that are completely abandoned for whatever reason, including the accounts of deceased persons.
Estimates from Hudson Barton and myself of active users are below 35 million!
By the way, what happened with the Skype Account(s) of Russel Shaw?