Your Skype shows ads? I've never seen ads on Skype.
There seem to be ways to make that go away (null listing hosts either directly in the hosts file or - on Windows - in the Internet Connection Settings). Maybe. Before I'd use that app for anything of value, outside of my Mondays .. I'd try these approaches.
When I created a second account for work with a new client, suddenly ads popped up everywhere.
I make myself available on nth number of services because they people I want to talk to are spread across them; Skype is not one of them.