http://winaero.com/blog/how-to-disable-ads-in-skype-updated-for-recent-versions/
除了apps.skype.com以外
可以去掉广告的空间，不会剩下空白
Win+R %appdata%\skype
把profile中config.xml
Change its value from this:
<AdvertPlaceholder>1</AdvertPlaceholder>
to this:
<AdvertPlaceholder>0</AdvertPlaceholder>
话说skype官方论坛可以讨论如何去广告，有点意外阿