Call a business as a customer and rate the answer
The campaign owner wants to know how their own branches or partners answer the phone. You call as a customer with a prepared question, then fill in a short rating: how long until someone answered, was the question resolved, how polite was the tone.
Each call needs a short written comment, so this task pays more than a survey of the same length.
You can take mystery call campaigns after ten verified calls of any other type.