This happened to me today...posting to see if anyone can replicate to get a great deal. Did a google search for this price for abcmouse and couldn't find anything. Lowest I found was $45. YMMV since it involes attempting to cancel your account.
I signed in to cancel my account. Followed prompts, and checked "price concerns" for the reason I was cancelling. An offer came up, offering me to upgrade to 12 months for $29.95.....which is a whopping 68% off! My account now says I am on a yearly subscription billed for $29.95 and my next billing date is nov. 2018.