A 3-month free trial of anything usually requires you to submit your credit card information to get started. You're eager to get started, so you happily give your credit card for 3 free months. Four months later, you notice less money in your bank account. What happened to your money?  

The answer, my friend, is the 3-month free trial, and your paid subscription becomes active. There's no way you could have missed an email informing you of the upcoming charge. How come no one told you? Did you read the fine print? I'm sure it's there.

Your, or your friend's, agent has a contract; in it, you'll find terms that look like the following example.

"If, after 350 days, you are satisfied with my agency's services and would like to continue working with me, you will not need to sign a new agreement. This Agreement will roll over to cover your new contract until you give me notice that you would like to negotiate new terms. "

This clause is the free-trial!  

• After 350 days, if you are satisfied, our contract rolls over - the "trial" period is over!

• If you are not happy, you are required to notify me in writing, and then we can negotiate. 

• There's not even an option to get out of the contract!  

Would you start dating someone without the option to break up?
Would you start a free trial of something knowing that you couldn't stop?
Then why would you enter a contract that doesn't give you the option to leave?  

For the agent, this is a great model. It protects their most valuable asset - you. Is that fair?