I'm SEO expert but now I'm in the middle of one really big SEO project and need some advice from other experts already done projects like this.(I can't share the URL,because is client website.)
Basically,we made a huge international business directory with more than 100 000 categories and subcategories and we filled the directory with millions of businesses worldwide (we didn't scrape content from the net,but bought huge companies database)
All the pages (categories + listings) are seo optimised - have keyword rich URL's + metatags and all of them are static.No duplicate content at all.
Also the directory has 100% hierarchical structure.
Everything looks fine,but there some things that bothers me:
1) First,do you think that when a website appears from nowhere,with millions of pages,Google and others SE will consider it as spam?The pages are not autogenerated,all have static content,but as long as i know,new untrusted websites with more then 10 000 pages published at once are suspicious in the eyes of SE.
2)We place 2 blocks on all pages with random generated internal categories and listings URL's (40 in total)
On page: mydomain.com/New_York/Category1/Subcategory1/
apart from static content,there are 40 internal links,different every time when you refresh the page.
20 internal categories URL's:
... and so on
and 20 listings URL's,like this:
So my question is:
Do you think that the PR value of the site will be splited and SE bots will be confused because of this random generated internal links?