I am in the process of adding plug ins to my Cubase LE4. There seems to be an ocean of plug ins out there ranging from free to very expensive, and one could spend a lifetime trying to learn about them all. I am confused about a few things. 1. Why are there so many companies, and is the market really big enough to sustain so many? 2. Why do some provide completely free plug ins? Why would anyone spend time to develop a product and then just give it away? How do these people make money (at least the ones that seem to not have any product for sale, which the free plug in would serve as a lost leader)? To sort through the vast ocean of information, I would be grateful if someone would list say the top five companies selling multi purpose plug ins, that are well regarded. Conversely, are there any that are overrated at their price point?