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Perfect simplicity and clarity! Everybody knows Apple's logo, with one bite taken from it.
This ad very cleverly shows "another" bite, showing the discount.
This is an example where the communication is very comfortable for the reader to get. It is as simple as possible, "but not simpler" as Einstein says.
More important than merely being cute, the ad is descriptive, and sticky. You already have the logo embedded in your mind, and this is a temporary alteration to it. This is the essence of the message; that there are temporary price cuts.
No clutter whatsoever, and the mutated logo raises the readers' curiosity to understand what's going on.
Brilliant!