Because there is a track record, like a blockchain in Bitcoin, and people will be able to figure out eventually, to whom the credit is due. Eventually, we will not need hidden intellectual property to retain credit to whom the credit is due... Many people say that time is money, few say that information is money, but it is. The whole internet keeps a record of who came up with what idea. With the rise of things like Ethereum, and other advanced information technologies, it looks like there will be a day, when thinkers will get their proper credit, even for the ideas of the past.