The best bet is for the leaders to just do what they do (being open would be nice, but I won't hold my breath), and for at least some of the trailing projects to collaborate in the interest of not being obsolete. The prize isn't necessarily just getting rich, its also creating a society where being rich doesn't matter so much. Personally, I want to see everyone get to do whatever they want with their lives. Lots of folks are into that.

Edit & Quick Thought: Being rich wouldn't hold a candle to being one of the OG developers of the system which results in utopia. Imagine the clout. You could make t-shirts. I'll personally get a back tattoo of their faces. Bonus, there's every chance you get to enjoy it for.. forever? Aging seems solvable with AGI.

If foundational models become openly available, then people will be working more on fine-tuning which seems to be much cheaper. Ideally they could explicitly exclude the leading players in their licensing to reduce the gap between whoever is first and everyone else, regardless of who is first. (But I'm not 100% on that last idea. I'll chew on it).

If we all have access to very-smart-but-not-AGI systems like GPT-4 and can more easily make narrow AI for cybersecurity, science, etc. Then even if the leading player is 6 months ahead, their intelligence advantage may not be enough to allow them to leverage their existing resources to dominate the world, just get very rich. I'm okay with that.