I see what you're saying, but I think you'll find that people have their own ideas of what success is, let alone the direction to take to succeed.
Rush and Tucker may have felt content to spread their own influence, to spread their message or morals as much as possible. Alternatively, they might not have trusted something that isn't directly in their control to prevent compromise or contradiction.
As a thought experiment, consider how you or others may feel about Gab, Rumble, Odysee, Brave browser, Truth Social, communities.win, Prager U, Turning Point USA, O'Keefe Media Group, or whatever else you know about. They are things being built, but which takes priority, or even granted support in the first place? Why?