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 use our free domain Yclas.com. This is due that Google Adsense banned all the domains at *.yclas.com due to customers 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, but you need to use your own domain. This feature it's available in all our plans.
We are sorry about the situation and hope to get google to lift the ban for the domain.