What are the Russkies up to?

Why are Russians sending 3 more satellites up in space now?
We must be aware whats going on!

The reporter say that they should last to 2012? Why did they choose that date?.
Is it like that they don`t need it after that?
Have they also discovered Nibiru or something else?

I believe she says "by 2012" it will provide a GPS alternative for Russia.
They probably just want their own system just in case the GPS system has some kind of problem? I'm not saying what the source of this "problem" may or may not be, but if, say, the GPS radio signal were to be jammed, it might be good to have another system capable of using a different frequency.
Maybe it's better than the current GPS system in some way?

I was thinking it wouldn't make any sense to launch a sat that would only last 4 years. Wouldn't be very cost-effective.