[quote name='evanft']So all I do is sign up, and that's it? And there's no "must use service for at least X number of days" requirement, either?[/quote]
Yea, you dont have to do anything but keep the trial active for 12/13 days.
I'll say this again to anyone who cancels these offers which are all from the same company (Yahoo Success, Google SEO, Quickbooks, Increase My Margin, eAuction). When you call them, get a confirmation number from the customer service rep and make sure you verify you are cancelling before the billing date. Also be specific about which offer you are cancelling. Since they have 5-6 offers all run through the same number it appears they might be a bit sloppy about cancelling the correct offer if you have signed up for multiple offers from them. Check your CC statements online to see if/when they charge you and if they try to charge you call them immediately to get it corrected.