I have always been skeptical about crowd links and didn't consider them useful for a website, as they are essentially spammy links. However, after numerous unsuccessful attempts to promote a client’s site using SEO links with no results, I decided, on the advice of a friend who is an SEO specialist, to try purchasing crowd links as an experiment. To my surprise, it worked, and the site's rankings began to improve. This is how spammy links appear on forums. Draw your own conclusions. I have come to the conclusion that if a site isn't showing growth, it's worth trying crowd links.