Wait. Consider these things:
If you are able to turn your products into samples specifically for this subscription service, consider what you would charge for these samples. What is the cost to you? What would you want to gain? Are you willing to offer your products or samples at a discount to this subscription service? Please remember that we want the box to be affordable to our subscribers, but that we hope to at least break-even as well. How can we work together to make this happen?