Free work makes you more profit than paid work.
Providing free work will lower your credibility and also your demand. But the headline says otherwise. Right? Let me explain. As a copywriter you can and should provide other services. Like email strategy, email automation set up, thumbnail design and YouTube strategy(if you are a scriptwriter), landing page copywriting etc. I will advice you to do these extras for free. Why? Because when you help clients more than what you are being paid for, they feel like they are indebted to you. That's human nature. When someone gives us more than what we expect, we feel indebted. That way later on in your career, you can ask them for a favour. (Yes, you should stay in contact with them even when you are not working with them) Like for referrals or networking or finding the right person to learn about any new trend or topic etc. And also, you should be the one to point out the problems and recommend doing them for free. The more indebted they feel, the more unforgettable you become.