I imagine that this app will be pirated. A lot. It's cool, so people want it. But useless, so peopel won't shell out $4 for it. If it were in the $1 vicinity, it'd be much less likely to be pirated, but I digress.
The app itself does seem pretty cool. I don't think I would acquire it though.
+1
Same can be said for Barrel ($3), TV Tube ($1), SleepFX ($5), etc. I think any tweak for pure aesthetics and not functionality shouldn't cost more than $1. I always use TetherMe as a benchmark since it's worth every penny and very useful.
I literally can barely, if at all tell Any difference between the two...