[davide101]

You are correct. Instead of seeing 10 posts on the page, they now see one post. (We have many longer posts, so it still meets Google's guidelines of having at least 300 words of unique content per page.)

So there is definitely less content to index, so I would assume we would see a reduction in search traffic. The vast majority of our search traffic comes to our blog, so this is not really an issue for us. I'd rather have 5x less traffic to forums with a 20x increase in conversion rate. Other forum managers would look at that formula and say it doesn't make sense to them. It all depends upon your model.

I wouldn't recommend this for most people unless you have a specific reason. Sites that do or have done something like this are Quora and many media sites using gating like the Wall Street Journal. You could also theoretically only gate older posts behind a login.