Account limits are detailed here, but you’ll also want to review the recent announcement about adaptive limits for direct messages for these kinds of scenarios. tl;dr you won’t see a “50k broadcast” limit, but there have been improvements lately to support more of these kinds of behaviours, and we are aware of the possibilities to improve further.
More generally, @bobber205 - just wanted to say that I know we’re not perfect, that the documentation in particular can be improved (thank you for your feedback on that, we are working on it), but I appreciate that you endure and persist in working with our platform. We appreciate everyone that builds with us. Thank you for your patience and understanding!