Question about PopAds and PopCash

I am experimenting with paid push ads right now, I'm using popads and popcash because of their low minimum deposit amount.

When I launch campaigns in both of these services I don't see any options to add visuals or edit the ad I am launching.
How ever when I launch campaigns in push.house I am able to edit the ad and see a preview of the push noti and how it will look on the users desktop/phone. To me it seems like popads/popcash is missing features or I am misunderstanding something.
Pop ads / Popcash only let me enter the URL of my landing page and that's it, that dosn't make sense to me, is there something I am missing?

I would assume you talk about the creative people see in the Pop-under or Pop over ad.
If you're direct linking the offer, it will most likely the publishers creative
In my knowledge you host a website yourself with the landing page, and onclick redirect to the offer (remember it has to be hosted in the target geo country, for optimal speeds).