Free: the episodes
The catalogue is the marketing, so it is not paywalled in the way a subscription library would be. You make a free account, you scroll, you watch.
That also answers the version of this search that is really asking for free porn: the free part is the part with no nudity in it.
Paid: generating anything explicit
Explicit clips are generated per request inside the chat with the Spicy toggle on, and they draw on tokens. Around a dozen tokens per clip is the order of magnitude to expect.
Tokens come with paid plans or are bought on top, and Candy runs a permanent discount on its plans, so the crossed out price on the upgrade panel is a reference point rather than a price anybody pays.
What free does not get you
It does not get you an uncensored episode, because that does not exist. It does not get you unlimited explicit generation, because generation is the metered part.
It does get you the whole catalogue and enough of a conversation to judge whether the companion behind an episode is worth paying for, which is the decision the format is built to put in front of you.