I am developing the impression that a link, even if it comes from a "valuable" or "popular" site, has more value if it is recent, and declining value as it ages.
Also, I am wondering, if a site was penalized for some reason then fixed/reinstated/whatever, do the old (pre-penalty) inlinks still carry value?
Also, as a separate issue, I am slowly coming to a conclusion that a site can be too big for its own good. If a site has, say, 5 million pages, even if they are sitemapped correctly, perhaps it is better from an SEO point of view to have smaller sites, say 50,000 pages. Plus, if some errors/bogus-web-lint-type-crud slip in to a huge site, they can be harder to spot, also making smaller sites easier to debug. However, from a business/branding/name-recognition point of view, possibly the single larger site is better. This may not be a clear-cut issue.
As always, open to comment.
Edited by nuts, 05 January 2009 - 07:31 AM.