To give you an example, our domain authority is currently a mediocre 41 due to not putting a lot of emphasis on it in the past. For that reason, we want to (almost) automatically scratch off any keyword with a difficulty higher than 70%—we just can’t rank today. Even the 60% range as a starting point is gutsy, but it’s achievable if the content is good enough.
Be sure to check what kind of customer support you can expect from your affiliate program once you have signed up. Do your research online and if possible, speak to other sellers using the program to get their thoughts. Can you speak to someone via phone or Skype or do you have to wait 72 hours for email responses? Be clear on this because trust me, you will need support at one point or another.