> Any chance they recently changed status, and it's just not showing up yet?

The Rebble Foundation incorporated in 2023, so I don't think so.

I agree it's strange. The advantages of being a 501c3 in the US are immense, and if you meet the criteria, it is not difficult to become one. Essentially every organization larger than 6 people in the US that could be a 501c3, is one, for this reason.

So if they aren't, I assume it's because they can't be. Which makes me wonder why.