External optimization of any web resource involves building the link equity (a.k.a. link juice). Backlinks to your website give it relevance in rankings by search engines. Meanwhile, it is very important to have a natural link profile.
Search engines rank the website popularity by links. It is getting done like this: if a large number of websites refer to the particular website, then to a larger extent, other authoritative sites influence the result. This means that the site is popular.
The same is with the internal articles of the site. When you internally relink the site, you should clearly realize that the article referred by the large number of other articles is more prioritized and important from the perspective of the search engine.
After all, if all links to your site are considered by search engines as commercial ones (i.e. purchased), the effect of this will be directly opposite to the expected one – from a drop in ratings to getting filtered.
That is why to make the link profile of your web resource look natural (or at least to seem like one), it is recommended to build it:
Sure thing there is a high risk that they will not be moderated and will be deleted. But if you politely ask to post a link to their article on your site (and at this point you leave the URL of your web resource), it may work out well and you will get a high quality link absolutely for free.
There are a few more general recommendations relevant to this topic that will help to make the link profile of your web resource to be more natural and effective.
First of all, you should post links only on topical resources containing useful and interesting content. This will increase the probability that a user will click on them to visit your website. That is why it is recommended to use the link aggregators as little as possible and try to manage the list of resources leading to your site on your own.
Secondly, you should keep an eye on scams that your competitors pull off. Some of them can use tactics of posting low quality links leading to your site. Thus, you may not even be aware of their existence and eventually end up getting filtered.
Thirdly, a natural link profile should at least meet the following:
If you take into account all of the above recommendations, you are very likely to be able to build the link equity of the website in such a way that the search engines will start to improve its ranking consistently. After some time this should lead to showing your web resource on the top of search-engine results.