You can put any banner you want using Yclas service. Can be any HTML code you wish from any Ad networks.
If you want to use Google Adsense banners, they will not be displayed if you are using our free domain Yclas.com. This is because Google Adsense banned all the domains at *.yclas.com due the fact that customers were generating fake clicks on their own ads. We can not restore that, we have tried contacting Google in multiple times.
If you still want to use Google Adsense, you can do it, but you need to use your own domain. This feature is available in all of our plans.
We are sorry about the situation, and we hope to get Google to lift the ban on the domain anytime soon.