Per this article, a Publisher can only have one remote Distributor in doing SQL Server Transactional Replication.
Each Publisher can be assigned to only a single Distributor instance, but multiple publishers can share a Distributor.
If this is the case, I am wondering how to scale out the publication of a database to a large number of Subscribers. Supposing a Publisher had 200 Subscribers with a large number of transactions, what would be a workable distribution architecture that could handle that load?