IArt.
What doesn't work
The business model lacks defensibility. Relying on a non-exclusive 'network of creators' and a personal following is a weak moat. A well-funded competitor could replicate the content style and use paid marketing to acquire a similar audience much faster.
IIArt.
Biggest risk
The primary risk is the lack of a scalable and defensible content production engine. The entire venture rests on your personal curation and a follower base that can be easily targeted by others. There is no proprietary technology or exclusive content rights to prevent imitation.
IIIArt.
Key question
Are you building a scalable media-tech company, or are you building a personal brand as a highly successful content curator? You need to decide, because the strategies for each are fundamentally different.