What are these RO32 buy-ins?

I feel like I missed something why are teams like BBG.A and NYFU bypassing the first day? Not saying they’re bad or anything I’m honestly hype teams like DarkZero are getting these passes, but I still don’t really see why they get them over other teams? Is it based off of circuit points?

teams that made it to top 12 get a bye. they deserve it.

To my knowledge

Because got through during the first open