Looks like this is live again with an increase from $10 to $12.50,
Get a $12.50 reward when you reload your Amazon.com Gift Card Balance with $100 or more (Applicable on first reload only)
Terms & Conditions
In order to qualify, this must (1) be the first time reloading your Amazon.com Gift Card Balance; (2) you must reload at least $100 in a single transaction by June 26, 2020, 11:59 AM (PT); and (3) you must be an Amazon.com Prime Member and you must use the Amazon.com Prime account to which you are currently logged in.
This offer is available to Prime members only.
This limited time offer expires the earlier of 11:59 AM (PT) June 26, 2020 or while supplies last.
The offer only applies to the first reload of your Amazon.com Gift Card Balance.
You must reload at least $100 in a single transaction to qualify.
For qualifying reload purchases, a one-time $12.50 Amazon.com Gift Card reward will be automatically applied to your Amazon.com Gift Card Balance within three (3) days.
Offer is limited to one $12.50 Amazon.com Gift Card Balance reward per Amazon Prime account.
This offer may not be combined with other offers.