dehghan,
As you know, we did experience a rare event with your negative balance in a particular month however, it was not due to a policy change and you and I dealt with the situation openly and respectfully.
Negating negative balances is a management decision to maintain ongoing and profitable relationships with our performing affiliates who would be discouraged to chip away at a large [and usually one-off] negative b. There are ways to manage these events without changing the program-wide policy on this issue and we are willing to consider these decisions to maintain positive and long term affiliate relationships.
Best,