Recently , there have been some issues with Mickeysoft and their (horrible) licensing project.
On the new MSN , they start to ask license money from 3rd party software vendors. Example : Trillian ; Check this story
YOU have to accept the new End User License Agreement , which states that Microsoft can ask for money in the future. There is no amount given , nor if it's a subscription or a one-time purchase. Who knows ?
I for one are not going to use any kind of moneydriven/spamdriven IM (Instant Messaging) pice of software , there are still more than enough free(ware) alternatives.