This reminded me of Hipchat's 30-day free trial that I recently discovered. I was mistakenly under the impression that they limited the trial to 5 users. I reached out to them on Twitter, since I couldn't find an email address for them anywhere, and they told me the trial can be for an unlimited amount of users. I think this is genius. With a product like Hipchat, 30 days provides a decent enough amount of time that companies will feel locked-in as long as they use it a fair amount. Great strategy.
