The Preview Card and the Verdict of a Random Audience
Launch library · evergreen read

Before a wide release, studios often gathered a general, unaffiliated audience to watch a finished or nearly finished film, distributing cards asking for immediate written reaction, a rough but genuinely useful gauge of how ordinary viewers, rather than industry insiders, actually responded to the work, however the paperwork happened to be filed at the time.
These preview cards could carry considerable influence, sometimes prompting reshoots, trims or a different ending entirely if audience response diverged sharply from what the studio had originally expected going into the screening based on internal judgement alone, a point too often left unexamined, however the specifics play out in practice.
Critics of the practice argued it favoured immediate, easily articulated reactions over more considered, lasting judgements about a film's quality, yet the preview card system persisted for decades, evidence of just how much weight studios placed on early, direct audience feedback before committing to a wide release.