What i really hate is that everyone tries to convince me to use that app. Why? What benefits does it have? Only the drawback that i have to transmit every phone

What i really hate is that everyone tries to convince me to use that app. Why? What benefits does it have? Only the drawback that i have to transmit every phone number in my address book to them. I don't want them to have my phone number and yet half a dozen people i know transferred it to them without my knowledge. In short: There is XMPP, ICQ, MSN, Yahoo, Facebook, Skype, etc. Why the hell another one? And one that will cost.. i really don't get it.. Next best thing to happen will be that some big advertising company (see myspace) will buy them.. hooray...