TEL Learning - your new best friend (cheap RA credits)

[canuckian]

Does anyone have any experience with double dipping on TEL discounts? This (https://homeschoolingforcollegecredit.com/discounts-2/) lists a 15% off code for one course that expires at the end of the month, and a 10% off code that expires in Sept. What I'd ideally like to do is use the 15% off code now to see if it's a fit for me, and then if it is, come back in a few weeks and use the 10% of code for the other courses I need.

I like that their course catalog and content is viewable online, and while they're slightly more expensive than ONU, I do like that they're super transparent with their course info.