Is it worth it to buy PBN links? The short answer to that is yes. If you are going to be building your own backlinks it is important that you follow best practices for building them. Most SEOs do not really make use of them in quite the same way that did some time ago.
This link- https://saketwahi.com/pbn-links/
Because Google and other search engines look at each link as an impression of the anchor text contained within the hyperlink, it makes sense that you want to have high quality links coming from relevant pages (at least for the major search engines). One way of achieving this is by having two sites that compliment each other and build on the one that has been established for longer. This means that there are certain requirements that must be met in order to get a link from a high quality site (the one with a lot of content and high search rankings for relevant keywords) to yours. The only links that I can think of that would work in this manner are those where you have both included a URL to your own site and included a hyperlink pointing to your partner’s site. If you are looking to build PBNs then this is the best option as you will be getting backlinks from a high quality site with a lot of content (and probably relevant keywords too).
The other option that SEOs have had in the past when trying to increase the amount of PBNs that they have on their website is to create a guest post for someone in their niche. Creating a guest post for someone in your niche can work well if done correctly but it has its drawbacks. Firstly, it is important that you create a blog related to the niche that you want to attract a lot of visitors to. A lot of the PBN directories do not allow blogs that have absolutely nothing to do with your niche theme to be included, so this means that you will have to find another way around this. Another disadvantage of having a guest post is that if your post is about a very good product or service, then the link will generally be associated with your main site by PBNs and if this offends you, then you may find that a different approach is required – for example, instead of having a link on your blog, you could have a link on your main site that directs visitors to the PBN page instead.