That blog post was much more vague, and harder to understand than the clear explanation two comments above. I can now see that they're obliquely referencing th

That blog post was much more vague, and harder to understand than the clear explanation two comments above. I can now see that they're obliquely referencing their collateral requirements, but that wouldn't have been clear to me before reading JumpCrisscross's comment. I think g9yuayon's point stands.