Very greedy design. Don't waste your time. I spent £8 on a 'historic pass' offering meagre rewards, and it doesn't even turn off ads. There are actual in-game goals tied to the spaceships that ask you to watch ads almost all the time. The amount of times I've closed the popup asking me to watch an ad is mind-numbing. Don't get me started on the pricing of everything else. Appealing to whales maybe. It is such a shame because it is very slick.