I'm happy to say that I just received payment from Goodwin and it came within the promised 90 day window!
I send a note to Goodwin earlier this week to check up on my payment and received a very polite and timely response from Amy, who appears to have a lot of empathy for shoppers who are overdue on payments.
I have sent an invitation to Amy to join the discussion here and recommend anyone who is due a payment from Goodwin contact her.