What the Hell Is a Crystal Dust Plug for Your Phone?

I know a lot of people like to throw on a lot of trinkets and flair and pizazz on your phone but would people really use this crystal dust plug? It's a little cubic zirconia diamond that plugs into your phone's headphone jack to add some bling and presumably protect the interior of your headphone jack.

It's only 3 bucks but like, seriously? Is this the equivalent of piercing your ear for a phone? Is it cool? Did I miss the memo? How often have you guys seen this? [Cases in the Box]