see the case and answer the question in the picture.
Write one page to support my methods that Mangod should continue to use the mailing list and tell all his customers and ask their consents.
write the pros and cons about my thoughts below
I think pros are that this methods can keep high revenue of company, get old customers’ loyalty and new customers’ trust, and this methods is more effective & innovative than competitors.
And cons are that he will lose customers, get a profit loss in short-term, get complaints &sues, and other company's copy.