I'll be happy to look into it, but can you describe the use case, so that I could better understand how this would be useful. Thanks for writing!
This would be for stuff we can use our $1 no-rush credits on.
Thanks! To clarify, though: I must be not looking at this right, but I only see 44 products that are sold by that merchant: https://www.amazon.com/b/?node=14978452011. Can you post a sample search here that would illustrate a case when this filter would be useful?
https://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=Amazon+Digital+Services+LLC basically any digital content basically through amazon like video game downloads or xbox digital gift cards and stuff like that