For a long time, site optimization experts argue: whether negative external factors can adversely affect promotion in Yandex and Google and reduce the position of the site in the ranking. Some argue that a lot of bad links can remove the site under the filter, others consider this statement to be absurd, otherwise it would be possible to poison competitors in this way. No search developer would allow this.
There is a grain of truth in both these statements. But, according to observations, links from the TOS can negatively affect the position of the site, however, if certain conditions are present.
The experience of promotion allowed us to determine these conditions. Bad links are much more than good and other factors ranking the site is weak. Speaking easier, if your site has a strong link mass, active visitors and high-quality internal optimization, do not worry that someone will harm you by acquiring bad links.
But if the listed factors in your site are weak, then even then you will not be harmed – you will not even get to the top and competitors will ignore your resource altogether. If, out of ignorance (or bad knowledge), you yourself only indiscriminately get links from the GE, then you will drive your resource to the very bottom. In principle, it is almost impossible to drastically change the site, changing only one of any factors.
The situation described above is not a rule, but rather an exception. But she perfectly demonstrates how you can “kill” your site by buying cheap links through aggregators and exchanges.
This does not mean that you need to forget about the exchanges, but you need to use them skillfully, and remember about such links as articles and reviews.