A study has found that adding copy to a new app’s website around the lines of “we expect 1000 users to join this year” increased signups for the app by 20%. People respond to the developer’s expectations and intentions of the app’s growth because those intentions were expressed, documented, published.

The same study found that for an app that already had its 1000 users, adding a link that said so, with the actual numbers published, proved to be equally effective.