[**gimmick**][1]

>a method or trick that is used to get people's attention or to sell something

Here's a good example of the word used in this way:

>Americans have made it clear: They don’t want a lot of gimmicks in their TVs.  
>
>In an effort to improve sales, though, television makers have tried gimmicks anyway. They have praised 3-D TVs. They have promoted voice controls. And they have highlighted Internet-streaming interfaces. [NYT][2]


  [1]: http://www.merriam-webster.com/dictionary/gimmick
  [2]: http://www.nytimes.com/2014/10/09/technology/personaltech/sharper-image-4k-tv-gimmick-worth-having.html