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This was atleast at the time of posting.
Thus it doesn't look like a special Google pick, or something really different. So, it does make sense for us, and can make sense for somebody else, but of course we understand that if everyone starts using them, SERPS would look spammy. Anyways, I think Google might let us know its position and tell us if we should better remove these little things or not.
However, in my unofficial survey of nearly 20 boxes (computers) only a quarter of them were actually setup with the correct browser settings and fonts to display some of the eye candies. And none were using a font that could display all of it. IT usually appears as a question mark "?" or Tilda "~" or even tripple dots "..." depending on the system used, so it is as helpful in grabbing attention as it is in diverting it by displaying weird unfriendly characters such as the ones mentioned.
In other words some people click on your listing for the cool eye candy and some avoid clicking on it since they see irrelevant characters instead of the eye candy due to their system setup. almost close to nobody would click on a url that starts with a question mark!
I don't like it because it looks artificial to me, (I thought it was fun at the time) so I can't wait for it to drop out of the cache.