Different calls to action are being tested to invite mobile users to register an account in order to perform some actions such as adding a page to a watchlist or uploading an image.
mobile_watchPageActionCta
invite mobile readers to register an account and save a page to the watchlist
mobile_editPageActionCta
invite mobile readers to register an account in order to edit a page
Note
Due to a bug with campaign logging, we considered users as part of a CTA cohort whether they had a CTA campaign or the corresponding article_action parameter:
We compared the rate of productive editors (defined as those new editors with at least one non-reverted main namespace edit within the first week of contributions).