Hi daniel.diaz
This indeed is a Spam Check Rule.
I tried replicating the issue from my side and was able to see the same message with 0.0 score. Even though it doesn't contribute to an overall score, it surely can mark your email as Spam.
I believe this rule exists to warn Recipients of those emails which claim you have won huge sum of money etc.
When I changed the amount within email body to a decent amount, the rule check didn't show up in Spam Analysis.