Unfortunately, there are people out in the world. That just see a quick buck. That never intend to do anything except be the "first" to get it out to a platform. Then never touch it again. Personally it's more of a Steam issue then the asset store. Just like having people that do nothing but write negative reviews. But whenever there is a chance to make a easy buck there will be scammers. On of the downsides of society in general.