Leafo noted: Can I submit my project after the bundle has started? Yes. It’s okay if you come in late, we’ll credit anyone who has already purchased the bundle with access to your project.  (https://itch.io/t/818544/join-the-bundle-for-racial-justice-and-equality)

How will this work? Will the extra content be added to existing bundle buyers' accounts or will you create another bundle? 

And a big Mahalo to itch.io for this donation drive, the creators for their work and all who donated! Seems the current $2M barrier will be broken soon! 

leaf @ itch.io

Jun 7
Lastly, since a few people are asking: All new content added will be granted to all existing people who bought the bundle.