What is the difference in US Playing Card Company decks?

Question

Why does the USPC have several different types of cards such as Bicycle, Hoyle, Bee, Maverick, and Aviator? Is there any reason why the USPC doesn't just make one kind of deck? It's almost as if these card are owned by different companies and competing against one another, but they are all owned by the USPC. Why is there more than one type of playing card deck that the USPC makes?

Answer 1

I think it is because they bought out those companies but since the brand name had some value, they kept selling  them.