To me [beehiiv](https://www.beehiiv.com/?via=12ca79) is the best because if you have a good subscriber acquisition method and are able to get subscribers organically, you could easily make your money back through boosts, which is a recommendation program where you can add newsletters to your recommended list and get paid every time someone subscribes to one of them. Beehiv can scale up to 100k and has good automation, only thing I woud lose out from convertkit is the referrals from Aidan.