Verify-purchase supported_until Envato API Problem

According to this: http://marketblog.envato.com/releases/item-support-related-api-changes/ the supported_until parameter will now be given to calls to edge verify-purchase:

//marketplace.envato.com/api/edge/{user}/{api}/verify-purchase:{purchase-code}.json

I checked, but it just gives me this for purchase codes before & after Sept 1, 2015:

"supported_until":""

I thought the value should be null for expired support, date for valid support and probably the supported_until param is not present for old purchase codes.

  • When can we expect a working API call for this?
  • The docs for this aren’t present in https://build.envato.com/api/
  • The results of get /author/sale doesn’t return a supported_until either