Do you have your service listed on fiverr or any other platform where i can find the review of your work as you know that youtube polices are very strict and they may spam your subscribers which is bad for the channel too.
People like to see testimonials for your service, if you still don;t have one you can send a trial in exchange for vouch or you send your official Fiverr services so we can check if you are offering a legit services.