There used to be websites where you could download paid for cc for free, but unfortunately I don't think they exist anymore
Also it's worth noting that paid for cc is against ToS.... but EA don't bother policing it
A guru replied to this thread https://forums.thesims.com/en_US/discussion/930045/ea-its-time-you-start-doing-something-about-the-entitled-cc-creators-in-the-sims-community/p3 where they basically confirmed it
-quote-
CC/Mods Locked Behind Paywalls - Creators cannot lock content they make using our game behind a paywall. While we do not police this content (there is no way we would create a team simply to monitor this) we do take reports sent to us seriously and action accordingly.
Patreon - We understand that folks who make CC / Mods for others to enjoy are doing it in their free time and may desire to offset costs to create the content by using this service. As long as the content is still made available FOR FREE we do not mind these types of pages. Folks who have a Patreon page are welcome to provide folks with "early access" incentives for their content but it should be made available to the general public within 2-3 weeks of it being given to folks early.