Well in my country most of the providers have a default monthly limit of around 80-100$, after it has been used out you can't use any services nomore unless you go to a client service centre and write a request to lift up the limit. Of course you can do that prior if you know that it wont be enough for you.

Another site that sucks: http://www.mtv.lt/ ... like the channel it self.
And that's the site of MTV Baltic...