Here is a typical Wobo using online IQ tests:
You are asked to take an online IQ test with a few questions. The answers are really irrelevant. You are told that the results will be text messaged to you, so you need to provide your cell phone number. You will then be texted a pin code to enter on the quiz.
Once you’ve done that, Voila! You have just subscribed to a $9.99/month subscription.