so contextual links from other sites are ok? irrespective of content on page
Let's just say it can work well. I would highly suggest that only quality links are used for the task, and you need to realize that if it is meant to decieve, IE: sending wheelchair traffic to a joke site, then a manual review might hurt you badly when done. Make sure the keywords are related to what the page is about, even if the content does not contain those keywords.