OB allowed users to send in emails and they would be posted, which is not a high bar (lower than, say, learning a Usenet reader) and a fair number of people contributed. It’s just that LW made it much easier and unsurprisingly got way more contributions. This apparently came as a big surprise to Eliezer (but not me, because of my long experience with Wikipedia; it was a bit of a Nupedia vs Wikipedia scenario to my eyes).
I think it has more to do with the fact that Overcoming Bias didn’t allow users to post.
OB allowed users to send in emails and they would be posted, which is not a high bar (lower than, say, learning a Usenet reader) and a fair number of people contributed. It’s just that LW made it much easier and unsurprisingly got way more contributions. This apparently came as a big surprise to Eliezer (but not me, because of my long experience with Wikipedia; it was a bit of a Nupedia vs Wikipedia scenario to my eyes).