According to gotyourback, the website is correct in that you will get $27 cashback with a monthly subscription.
Question is, how long will Disney take to tell ShopBack that you've paid? Worse comes to worst, you have to pay for two months? ($29.98).
Cashback tracking
- Cashback is available only if you visit the Disney+ website via our platform.
- Disney+ can only confirm to us that an order is recorded if you accept all cookies that appear on their pages.
- Your Cashback may be tracked at a different rate initially and adjusted to the correct rate when we confirm the transaction details.
I am guessing you will see $2.30 =)
$27 must be for the Annual standard.