Good tip. I've pulled all paid advertising from Facebook and Twitter, but there are a TON of HR related companies on there tweeting articles and advice, so now

Good tip. I've pulled all paid advertising from Facebook and Twitter, but there are a TON of HR related companies on there tweeting articles and advice, so nowadays I actively seek out great articles and use BufferApp to schedule a regular trickle of them on my own feeds. I get a fair few new followers and retweets etc. this way, but impossible at this stage to measure how that relates to sign ups.