One of the mods did spot this first thing this morning. It's very difficult to identify these posts automatically. We do have other meaures in place such as members outside the UK registering but they are using fresh gmail accounts and VPN ip addresses that show them from the UK, but looking at their timezone they are from Lagos.
Trust me we do filter a lot of stuff and usually posts are filtered to new members, but the clever part is they post non scammy information to bypass the new post limits, so they get through. We don't want to try and inspect every post as many members are legit, it's just the new members we inspect the first few posts.
Last 7 days we have cleaned over 1000 attempted spammy sign-ups and 107 were allowed, you can see the level we have to deal with.
Colin is like lightning when it comes to banning them out.
if the emails are too much you can reduce them to once every 24 hours and you can get a digest of the day.