That just tells me you don't understand how AI works. Grok has strong anti child exploitation controls that are stronger than other AIs. The fact is the AI doesn't really understand what its doing. It's a series of predictors that uses the best match to generate content. There are layers that will abort a generation if it finds things its trained on, but people constantly find ways to bypass the filters.
Charging Twitter users is a way to make it profitable. No major AI is profitable yet.