if you are talking about the ads which you put on your site there are different sized ads to the free different plans of hosting, the static plan just needs a text link, the advanced needs a small banner, and the corporate a larger banner i dont know the exact sizes,
to get the ad codes just go to
nwfuture.x10hosting.com/ads.zip (www.) and they are in a .zip file.
the banners must be visible when people visit your sight straight away on every page at the top. You can position them wherever you want but they must be seen straight away, for like mine example
www.newfuture.tk i have the banner in its own cell, at the top (Note you might not be able to see the banners as i cant, but they are still there)
hope this helps, and if your not on about banners for your website i just wrote this for nothing, personaly i like having x10 banners on my site thats why i didn't choose to go for a domain, x10 help me i help x10, its only fair as there great service is free.