Nick here from Shopify.
This isn't something I have heard of. Do you remember where you heard about it? I am wondering if you have it mixed up with the 60 minutes free design support time for Shopify themes? If you're on the Basic Shopify plan or higher, then you can receive 60 minutes of complimentary design support. But you must be using a free Shopify theme and not a third party purchased theme. You can see more about this here.
There are some offers from Shopify Partners and Experts in this community topic board here, but there aren't any via Shopify for Experts.
All the best, Nick