Sometimes Koodo does a lot of great things that no one knows since it is never mentioned or clarified. This is one of those occasions. Based on this post: http://community.koodomobile.com/koodo/topics/3-days-20th-to-24th?utm_source=notification&utm_medium=email&utm_campaign=new_reply&utm_content=reply_button&reply
[id]=14783143#reply_14783143 Koodo should say on their FAQ and on the Add-ons page that when you sign up for the roaming add-on that it is good for the next 3, 10, 30 days plus the partial day that you actually added the add-on. In effect, you get a bonus partial day. Isn't that amazing!