Yes! I use linkmetro too. I did get some offers, however most of them had a link to my website on a page that wasn't indexed by Google..
Why? I do both and both work but automating the work allows you to do more, faster. With the right automation you keep the links in theme, always cached, always checks for backlinks for you. It removes the tediousness and allows you to focus on building more content. That is why I use receive links.