It looks like Ethereum Limited is a very promising project with ambitious targets (September 2019 the price of 1 ETHL = 1 ETH), but why don't they show the team?
You can't force someone to reveal their identity if they don't want to do so. There can be many reasons. One of them can be the lack of legality, as the ICOs are banned in a number of countries such as China and South Korea. The project is a very promising one, so why bother so much about the team?