When you visit Redis.com to download one of their free ebooks, you will be presented with a form that requests your email address. However, upon submitting your email, the form expands to include additional mandatory fields that may not be directly related to the ebook download.

This sudden UI change and collection of unnecessary information can be considered as examples of dark patterns such as Misdirection and Privacy Zuckering.

It's important to be aware of these tactics and make informed decisions about providing personal information."

Found by Arnav