Domain Link Diversity

As many of you know, it's important that your links come from different domains. I am not only talking about different "platforms" like forum links, gov links, social bookmarks and so on. What I mean is: Some websites have thousand of backlinks coming from a couple dozen domains.

Yet this websites, seem to rank good and have no penalty. But isn't it unnatural to receive so many links from one domain? How many links can I have from one domain without triggering flags? Let's say I post a new article on Bloglovin every week and link to one of my articles or I do the same with web 2.0.

Would I be safe? I couldn't really find informations about this topic so please share your experience and/or provide me good posts/articles about this topic.

I"m wondering the same thing. Lets say i found a .gov forum where u can get profile backlink, if i make 100 of those links will it give me more power to my website?

A ton of social links (web 2.0) is pretty normal. Think about it, if Facebook or twitter had all their shares and retweets penalized, half the internet would be out of jobs. Same goes for sites that syndicate their content, although there you have to be a bit careful as they're not all great (safe)

As for the .gov links, 100 from the same .gov domain pointing to the same URL (probably irrelevant url) is a bad idea. Be very careful with .edu and .gov backlinks, Google keeps a close eye on them and VERY few niches are relevant to those domains.

There is no magic number to hit. First, each search query is different, because the competition is different. Second, there is a difference between (1) a site-wide link from a footer/sidebar and (2) many in-content links from the same domain (the latter is, obviously, much more powerful). Third, links are no longer the holy grail of SEO as other factors are quickly growing in importance.

Thanks for the great answer! Another question regarding web 2.0 sites:

How many link can I build from one web 2.0 site I created? And how much posts/time should I let pass before linking again? Or is it a too big footprint If I link every 2 week from my page1.wordpress site to my money page? As far as I understood I should build new web 2.0 sites after using them for a link. Of course I would also link to other related sites.

And when do web 2.0 sites lose their value? Do I really have to publish a post every month to keep them "relevant and up-to-date"?

Avoid pattern and make it look natural, then you are fine. Its not like if you have 100 links from single domain, then you will get penalty automatically. Anchor text plays important role here.

Agree with the above reply - as a rule of a thumb you should be alright if you keep it natural and mind the reasonable proportions with backlinks. There are many tools allowing to analyze the diversity of your link profile and to check the linking domains destribution (TLDs, IPs, counrties), make sure backlinks are well-spread across your website (do not point to one homepage alltogether), and see if there are enough unique anchor texts - even if they come from one domain.