Re: Quick question about commercial use?

From what I know it's alright to earn money by playing The Sims 4. 

But I do suggest filling in this form: http://help.ea.com/en/article/how-to-request-permission-for-ea-games-content/

Better safe than sorry right?

On the CC, CC is made by the player, so it's theirs to do with what they want.