blackhat app store

Lately I've been doing some research about App Store and it's review/rating system. It wasn't purely academic interest - I tried to add some reviews to a single app (I wouldn't consider it spamming - just a few more). From 4 of them, 1 was visible ( it was the 2nd), but probably got deleted...

So I am just starting my App Marketing learning. Trying to gain knowledge about all white hat and black hat methods. Recently during my analysis, I came across apps with a weird code placed strategically in the app description. To give you guys example of what i am talking about, I am attaching...