preview/frontpage view is what you see on kickstarter without clicking into xenonaut project page. for example if you search for xenonauts on kick starter, the search result page displays the preview in a small box with abbreviated description. right now the short description says "A blend of turn-based ground combat and strategic command, Xenonauts puts you in charge of defending the world from alien ".
the FAQ i'm referring to is under "I’m interested in having my portrait done as a soldier in the game. What are the restrictions?"