Yes you can. When you're writing in the Hub's 'Text' Capsule you'll see HTML towards to top left of your Capsule. Click on it and it will bring up a new window. You type your Affiliate Code into the page here. You submit the changes and it returns you to the text capsule. Here you'll see the link appear. You can then high-light it and use the top tab's links button to change the settings (ie: I find it better to have my links open in a new window so they don't navigate away from my Hubpage at the same time). I use it this way for promoting my dating affiliate links. See my Hubs if you want to check out the programs I'm using.