I'll pay for placement of contextual link in old article or in the text of home page. Just to make a certain keyword the active link without changing the text. Site should be DA 40+ (Domain Authority MOZ). Page Authority in which will be placed my link should be 40+ If you are the author of articles from authoritative website. You can edit an article and insert a thematic link in the text of old article (Page Authority should be 40+). If you are a website owner DA 40+, just show me your domain and I will show page which is interesting for a link placement. Write your offers in PM
Contact Google.com/webmasters with the website(s) you need linked to. Be sure to tell them you want to pay for contextual links in your request.
The person above is doing the right thing as Backlinks is still one of the top 3 factors for ranking on Google and they usually don't care unless you part of website with link sold on every article.
I encourage you to keep executing this theory. More room in the serps for me https://support.google.com/webmasters/answer/66356?hl=en