Really nice post Jose, it was a great explanation how you used the indirect approach in that persuasive email. I agree with you on how important is to be persuasive when we want to request or demand something from other people. On the second question, I think the best appeal to persuade buyers to make a purchase is ethos because ethos focus on credibility and buyers are willing to take a decision about buying products on the credibility and the benefit that they can get from that product. Even though pathos are focus on an emotional appeal I do not think buyers focus their purchases in an emotional perspective instead of credibility and purpose of the products.