Thank you for wanting to join the platform. Auditors review ads at random from their homes and in the streets (where ads are shown). The incentive is for auditors to be truthful as they only enter bounties when they belong with 51% or more of the rest of the auditors selecting a given choice. Meaning as long as there are more honest people than not for a particular auditing task, bad actors will be automatically punished. Most auditing is done in the streets, so there is no room for machine impersonation there. Also, auditors are chosen at random for ads in their area. Let me entertain for a second the idea of an automatic program for auditing done at home:

Let's suppose you create a Selenium program to automate account creation, joining the platform, and auditing ads at random. Your program will fail social oracle auditing, which are programs that review publisher, operator, and auditor behaviors (https://bitfari.org/2021/06/19/what-is-a-social-oracle/), case in point you might fail prompts requiring to verify you're human. Your karma will stay at zero and you will have to wait weeks for a second task and eventually your karma goes negative and your account is blocked from auditing tasks. You can read our section on fraud prevention here: https://bitfari.org/how-bitfari-prevents-ad-fraud/.