I am using the free Spotify and I understand that there are advertizements to subsidise the service, but on many occasions there are multiple advertisements playing simutaniosly on top of one another (not back to back). The ads are playing all at once, the listner cannot listen to any of the ads. At times there are ads that play while the song is playing. The latest offender was an ad by Allstate Insurance.
This sounds more like a bug that's worth investigating. Could you please create a new topic in the respective help section / ongoing issues board and provide more info about the issue. Then we can check it out there.