@Spuleo I moved your post over to this existing thread: Still hearing ads with Pandora Plus
It looks like these advertisements are getting triggered when you attempt to stream on demand content.
Since the ability to listen to specific songs on demand is only an option with Pandora Premium, you will first need to watch an ad in order to do so with your Pandora Plus subscription.
For a complete explanation, check out the accepted solution to this thread.
Hope this helps!
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