I've written a lengthy information-guide pdf and would like to direct the readers to a highly related affiliate service. Where do you think is best to place the affiliate link? A or B? A. Include a link to the service in the downloaded pdf B. Keep the info PDF ad-free and send a follow-up email a few days later focusing on the affiliate service. (I know that an A/B split would be the best way to find out, but this is my first attempt and I'm trying to keep cost low) From the 2 options above, which do you think would work better and why, based on your experience.