That is a big picture and not really a banner. Banner usually is something you get in sizes and has stuff on it that allows you to promote it. Like for example "come to yolodice and get x return from each loss" or whatever, like something that would attract customers to the website. Not just a picture with words on it that doesn't really yell out "come either" or something. Which is why that is not a banner, that is just a picture with yolodice logo in it.

I would say if you want affiliates to work for you, premade ready banners are one of the most important things, I do not know if yolodice has any or not, but whenever I did affiliate marketing back in the day, I used banners that were already prepared for this purpsoe with the affiliate link ingrained in them for me to just copy and paste to my website.