It's not so hard to have a high chargeback ratio with 1-2 signups per week.
That's max 8 signups per month - so if just 1 of them chargeback that's a 12% chargeback rate on your traffic. Makes it look really bad because of the smaller numbers.
Whereas if someone's sending 50 signups per pay period and 2 people charge back, it doesn't raise any flags because the percentage is lower.
Funny that you can still access your account though - maybe they were hoping you wouldn't see the email and would just keep sending them traffic thinking things were normal.
