In the language of Polandball comics, it means “give land/territory”.
“Gib” is taken from the German imperative for “give!”
Best theory is that “clay” as “land” originates from a bad machine translation.
It seems somene created a Wiki that covers these terms: https://www.polandballwiki.com/wiki/Terminology#Clay
It would be unwise for a bank to publish its exact fraud detection and risk management policies, otherwise they could be easily circumvented. A lot of these policies will be embodied in their internal backend services.
Someone will now inevitably mention “security by obscurity”. But Kerckhoff’s Principle is specifically about cryptosystems which should derive their security solely from the strength of the keys. That way, confidentiality is still ensured even when details about the cryptosystem become known to adversaries.
But non-cryptographic aspects of security benefit from asymmetric knowledge, from grey areas, from increasing risk for adversaries.