I have long since switched to other services because Spotify advertising drove me crazy with the same ads And he wasn't using it enough to justify a premium, but shows like Smutefy make him reconsider.
This exclusive Mac OS X application installs on the top bar and detects when there is an advertisement, at which point it silences it. Although the application is not perfect since we will hear the first seconds of the announcement, silencing it for most of its duration makes it worthwhile.
For it to work correctly you must have Growl and Soundflower installed, they say in Bitelia. I have already tried it and I think I will continue without using Spotify, until the first seconds they become hateful ...
Link | smutefy