Hi there! In my opinion, there are many types of affiliate campaigns that go well with email marketing. But what really matters is if the campaign you choose will really help you make money... My suggestion is to use an offerwall in your website or app like what I am doing now. My
affiliate partner has this high converting offerwall that let's me display different offers from around the world... And what's even great about this is you can use it regardless of the type of website or niche that you have and you still earn money...
Hope this helps!