Faulty logic: "I made money, so it's not a scam"

I know that for most people this logic would seem obviously insane:

"I made money, so it's not a scam".

Yet, time and time it's the #1 defense of people in controversial programs that have come under suspicion of being a scam OR have been determined to be a scam.

Here are some actual quotes of people using that defense for programs that have come under suspicion, are being investigated or have already been shut down:

" I have only put in $300.00 out of pocket. And have withdrawn $495.00
So I can tell you with my experiance this is not a SCAM True deal."

"I just made money in my sleep…I can vouch that it's not a scam."

It's easy to find THOUSANDS of statements like this defending some very questionable programs – or as mentioned before – even programs that have already been shut down.

Of course the logic is just about as valid as saying:

"I robbed a bank. I didn't get caught. So it's not illegal."

Somehow the "I made money so it's not a scam" will bizarrely convince them that the laws of logic don't apply in their case.

Perhaps the "defense of the system" becomes part of the "lingo" of the system and ultimately they are blocked either from inner emotional barriers or outer peer-pressure or "cult-pressure" from validating their logic with eternal reality checks.