draw users in with piles of money and way better exposure, then get everyone on board with your well ran service with good ui and 100% uptime. Play nice with everyone else, meanwhile gaining dominance on the fediverse. Get a very large userbase in comparison to everyone else. Now, once you gain that dominance, you basically control the fediverse. You can steer it anyway you want. You could even defederate with your userbase and enjoy your new found network built on the back of the community.