You shouldn’t pre-order games, but people do it all the time anyway. Increasingly, people have gotten in the habit of pre-ordering DLC too, paying up front for content that won’t be delivered for months or even years,

Valve is taking a stance against season passes on Steam, implementing new guidelines for developers that’ll force them to be clearer about what’s in season passes and offer refunds if those plans change.

Steam's new policies require season passes to specify content and release dates, with refunds for cancelled DLC.