We invented a game where winners go to sponsoring ecommerce sites to redeem their prize. We guarantee site traffic and site pays nothing until a player selects their prize on their site to redeem
I haven't come across a list like this and it's something I've looked for across a few years.
The best solution I've come across is using LinkedIn and one step further LinkedIn Sales navigator adding LinkedIn Helper to automate the leads. You can target keywords like "ecommerce merchants" or "shopify supplier" etc. I've met many suppliers with this method.
Hope it helps!
