As stated in this thread, WhenU changed theyr policy about announcing any changes into the EULA.
http://bsplayer.com/forum/viewtopic.php?t=11612
So, if you don't go to WhenU page to read, they won't announce you if WhenU became malware, spyware, virus or anything else. So, BSPlayer married with an adware but may have a virused husband today, and users don't have a clue about that as WhenU won't announce them.