Bad actors use fake accounts to commit financially motivated attacks, including reward abuse on retail sites, money laundering via online banking, and even as a disguise for credential stuffing.

Testing of large numbers of compromised credentials (i.e., usernames and passwords breached from another site) by attackers against your login application to compromise those accounts for monetary gain.
 

The automated abuse of checkout pages to identify missing values of credit cards like expiration date or card security code (CSC).
 

Acquisition of goods or services by abusing the application in a manner that a normal user would be unable to undertake manually, eroding customer trust.
 

A type of brute force attack in which attackers check millions of gift card number variations on a gift card application to identify card numbers that hold value.

The use of automated tools to collect large amounts of data from a target application in order to reuse or sell that data elsewhere.

Automated repeated clicking or requesting or submitting content, skewing app-generated business intelligence data.