Rappa principle

Rappa is a same kind of Suppa and in broader sense, these words mean Ninja.
What I would like to mention is that Rappa only believe hard cash but never believe verbal words.
So whenever you might consider info. about Ninja, you must give him hard cash
directly at that moment. Words can be changed into lie or false amount of money. So at first glance, Ninja is believer of realist. It is very hard to cheat them unless hard cash is presented in front of them. Don't mis-understand that you can treat them under your nose at your own will. Because if amount of hard cash does not match what Ninja expected, there is possibility to be refused by them.