No Docker Hub. That's wrong.

All calculations are right, mathematically I don't see an error here.

But they'd better check their limits.

@ddephor So having both 0 and -1 private repositories simultaneously is not a mathematical error?

0 repositories allowed

1 repository active

-1 repositories left

0 - 1 = -1, mathematically correct.

It's like the old mathematician joke:

If 3 people get into a bus and 7 get out, 4 people have to enter the bus so that it's empty.

@ddephor I consider "available" and "left" to be sufficiently different that your interpretation doesn't match mine. I can understand yours, but I disagree.