Well, it's a combination of a variety of things, including...
-being very busy with real-world affairs;
-a terrible internet connection;
-and general disinterest - particularly in the Rare Seldas Chat; that thing has gone downhill in so many ways.
There's a variety of other things, but the above just about sums it up... Also, Skype isn't the only place online where I have decreased activity; I've become less active on the internet in general, going on for no more than an hour [on weekdays]...