Why Do Customers Buy Layer Styles?

So far all I’ve really made for GraphicRiver are Photoshop Layer Styles, and I spend a lot of time on them. Some of my most recent ones took a few weeks to complete, but my sales aren’t all that great, which is a whole other thing. So I was trying to think about why people would buy them in the first place, what do people use them for? I make them because I find it fun and relaxing to do so, but maybe it’s not worth it to fill my portfolio with them, or maybe I just need a better idea about how they’re used so I can cater more to that need.

I do have plans to make different items in the future, but for now I have lots of layer styles.