An arts online magazine. The manager needs to include ads but don't want to do it on a obstructive or invasive way. So far so good, I agree.

Since this is an arts and culture mag, he gets the idea of having a piano keyboard on the sidebar. Each of the keys has to be animated so that on hover it seems to move and play a note. When clicked, it displays an ad. The user don't know or see the ad until he/she plays the note.

Of course no one bought any of the keys. Hours of work wasted.

We all hate ads but some workarounds are not worth it.