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Moz Local presently only supports the United States. I ran into this myself a while ago. Hopefully they'll get around to supporting UK and Germany soon.

I wouldn't advise a client to link out to one site so much unless it was adding significant value to the page. This kind of "list of links" page is not particularly useful to visitors who could probably have found the webmd pages anyway and it doesn't add much to the content of the website. I suspect it was created in a misguided attempt to satisfy a criterion of linking to authority sites.

The page is also titled "Saint Louis Links" but AFAIK webmd is not a St Louis company.

You need to ask "am I doing this purely for the search engines/SEO purposes?" or for the visitors. If the latter you should nearly always go ahead with it but of course optimize it for SEO. If the former you should probably drop it as you should be building for your audience, not for search engine algorithms.

Edited to answer your direct question: if links are adding value to your content you should make them followed.

This is a known problem with YouTube's safety mode filter but there is not much information about it. There is no official appeals process but you can report it on the support forum thread where one of the community volunteers, Epontius, has been helping to escalate some users false positive reports to YouTube's staff. You could report the false positive there and ask for Epontius help. Hope this helps.

410 means "Gone" and is used to indicate a resource no longer exists. If it exists use 200 (OK). If it is out-dated place a notice to that effect but still leave it as 200. Putting a noindex instruction in the robots meta element should be sufficient to remove it from the Google index, though it may take some time. Nofollow is probably not what you want to do as this will destroy any link value flowing through those pages. If it is so out-dated that it is considered valueless then it should be deleted and 410'd. A 301 redirect can be used where a new resource that substantially replaces the old resource has been created.

Not sure why you would want to keep Google's index of your site 'lean' unless you have a lot of resources competing for the same keywords and are concerned about cannibalization.

Your site is competing in a very highly competitive field. I did a check in Moz Keyword Difficulty on your example page's targeted keyword (nokia lumia 830 review) and that keyword is highly competitive. The Google India SERP for the keyword is dominated by high domain authority sites with high page authority pages.

Michael has it right. Online Agency (onlineagency.com) build websites for travel agencies. In the URLs you gave, Patrick, you can see some sort of ID for the site (starmandstravel.com). I guess that this content.onlineagency.com subdomain is the content management system to allow the travel agencies to update their content.

Google may be interpreting lots of similar/related websites on the same infrastructure as an attempt to game its algorithms (they have the same nameservers, although different c blocks but many of the other sites built by that agency also share the same c block [..170.140]).

I think it is important to distinguish the purpose of the automated validation services offered by Google and Yandex, which is to ensure that the properties utilized by the respective search engine are present, and the actual schema.org structured data initiative which doesn't place many requirements on publishers.

With that in mind when Yandex states that the address and telephone properties are required for http://schema.org/Organization, it doesn't mean they are required by schema.org but rather that they are required by Yandex. Google's Structured Data Testing Tool doesn't state that these are required because for Google's purposes they are not.

So both are correct but for purposes of ensuring your structured data is showing up you do need to test in all of the relevant tools. For less mission-critical structured data it is OK just to follow the Schema.org documentation and wait for the providers to implement support.

Try using something like LiveHTTPHeaders to view all of the HTTP requests and responses involved. You should see the request going to the redirected domain (GET domain.co.uk) and then the response such as HTTP/1.1 301 Moved Permanently followed by a new request to the new domain (GET domain2.co.uk) and the response will naturally be HTTP/1.1 200 OK because the server at the new domain has answered the request successfully.

Your question is somewhat ambiguous. "Too many requests" could mean that your website's design is pulling in a lot of resources and this, particularly with Javascript, can cause load speed issues. If it is related to this you can look to merging some of your Javascript files, loading Javascript asynchronously where advisable, look at reducing CSS bloat (stripping unused rules, etc).

"Too many requests" could also mean that the server is suffering under load. If it is this latter meaning reducing any design-related resource loading issues may actually help somewhat but the site will still not reach reasonable speeds. To resolve this you'll need to look at reducing load on the server. This can be accomplished by making use of caches where appropriate.

Use the PageSpeed extension in Chrome or Firefox to diagnose some of the problems that might be affecting your site. If you suspect server load and if you have SSH access assuming it is a *nix machine try the "uptime" utility and have a look at the load averages.