According to RedHat/IBM, "CentOS Stream will now be the sole repository for public RHEL-related source code releases." For people who buy RHEL, "Red Hat customers and partners can access RHEL sources via the customer and partner portals, in accordance with their subscription agreement." The problem is that the subscription agreement forbids redistribution of that source code, meaning that while technically and legally the source can be shared, RedHat would then cancel your subscription.