I have used the content gateway to promote both live and on demand webinars. I have not tried hosting PDFs. We embedded the gateway on the company website (I recall the developers saying that this was a pain) and it was an effective way to drive registration and extend the life of webinars past.. What I did not like about the gateway was that it was difficult to organize. When I used it, it organized by date. So, If you run a weekly demo the gateway will look repetitive. That is the only main complaint I can think of right now...Make sure to take each webinar off the gateway as soon as it happens or else there will be old webinars on your upcoming tab. On24 is great because of the LaunchPoint and the ease of hosting simulive webinars.