I feel like there are better ways to trap spam accounts though. Like, what is it that they're doing in that 48 hours? Is somebody manually checking these? All I can assume is that if they are querying some of the services available to see if the account has been used for spam purposes... but I doubt they're doing that manually or that's going to be a huge issue as they try to scale the site.

I'd definitely be interested to know what the technical reason is for the delay.