Hey Justin,

I recommend calling them before actually sending them anything. It is cheap to send out stuff, but you don't want to just be giving your product to people who don't plan to help you in return.

It seems the best you can do is a verbal agreement, unless you live in the same city, then take the fight to their house.

Just kidding buddy, you could ask for a pic of their list size, but that can be forged. Videos are a bit complicated to make just to prove a list size, plus you're not guaranteed that they would still promote your product.

I think maybe if you get a verbal agreement, then they back out, you could post something on here about that. I am sure the person would not make that mistake again. Of course you should call them to see if they can explain themselves first, you shouldn't judge too quickly because there may have been unforseen circumstances.

Best of luck and I hope this helped.

Sylvan Noel