In this case, someone realized that this could have business value. There's lot of athletes who train to be fast to react and this ball if any needs fast reaction skills to catch.
Here's a video from CorePerformance about training with reaction ball. It looks just like the one's from TV shop, but I believe this really works.
Even the idea feels really simple, even a silly one, this excellent example of how innovations don't need to be that complex. I've played a long time different sport requiring fast reactions and this would have definitely been a good addition to reaction trainings. This one of those things that everyone can say that: "I could have invented that one." The thing there is that, you didn't. It required someone with vision to productise this worthless piece of rubber to actual product.
Written by +Henri Hämäläinen