On many travel blogs, the writers offer links to credit card deals, from which they receive a bonus. I am not a blogger, but friends seek my advice about acquiring miles. How can I get links that allow friends to apply for cards, which also provide me a mileage bonus for the referral? I’m assuming (maybe wrongly) that these links are different than those normally sent in e-mails or other promotional offers from the card issuers. I help my friends for free, but it would be nice if I could get a small benefit for my time and knowledge.