Ok, thanks. I will go with subdirecotries instead of subdomains then. Thanks!
But what about this siloing? It still isn't clear to me. And not so much sense actually...
As I understand it after reading a bit about it, you should have a landingpage or home page.
In the body text you link to let's say 5 other articles about specific related themes. So let's say I have: disease.com and in the body I have a general story about it and I link to 5 different themed articles in there like:
-disease treatments
-disease symptopms
-disease medication
-disease books
-disease whatever...
On your home page you do not add navigation, but only at the bottom of the page three additional links to: homepage, sitemap and contact us. No more navigation what so ever...
Then, as I understand it, I should make various articles for each theme. so let's say, I make 5 for each theme. The example would be this:
Home (links only to

Disease Symptoms Disease Treatments Disease Medicaton Disease Books etc...
| | | |
article 1 article 1 article 1 article 1
| | | |
article 2 article 2 article 2 article 2
| | | |
article 3 article 3 article 3 article 3
| etc. etc. | etc. etc. | etc. etc. | etc. etc.
So within the theme you only link to the next article within that theme. That's right isn't it?
But what about the users? I think it is very user unfriendly, since the user only will see what all your articles are about, once they are in the themed article structure and they only have the option to go to the next article (you do not link to previous articles). They have no navigation what so ever from let's say articles about disease treatments to disease syptoms. The only option for the user is to go to the home page or the site map through the links at the bottom of the page.
Do I understand this correctly and does it work? If I were to come to a site like that, I would probably leave it since there was only one way to go. On the other hand, for adsense proposes it might be a good idea, since the user has no links to choose from, but the adsense links.
What do you guys think?