Could it be the difficulty people appear to have registering puts a lot off joining? Of the membership list I have counted 63 members who have less than 10 posts, I wonder why that is?
Other than a firsr post chrck there is no further check after joining, so i don't see fewer than 10 posts numbers rekates to the difficulty of joining.
Note we revently based on discussion with DavidLHarris, ans please come back David and post some more, we updated tge questions asked to make it a bit harder for spammers to join. It's reduced the numbers from around 50 a day to around 5. That said they still get through. Whenever we made the chsnges, we checked that regustering was still easy enough to do. Removing, or watering down substantially, the checks we do have would lead to much higher levels of spam members which creates both a substantial amount of work for mod team and make it much easier to miss genuine applicants.