Reply #19: you are looking at

[selador]

one discrete transaction

the issue is PATTERNS.

same thing is the case on all sorts of organized crime, money laundering, bribery, and drug cases

act X may not be suspicious

but an aggregate pattern is.

in drug houses for example, a visitor who arrives and leaves 5 minutes later is not suspicious

when it happens 20 times a day, that adds to suspicion.

etc.