I discovered that it doesn't work when resources are starting. It does when there aren't any.
For me it defeats the purpose of using this right now since I wanted to refuse players from joining when resources were starting.
EDIT: Yes, I can still refuse them, but it would be nice to have a message too.
EDIT 2: I came to know that the problem wasn't the resources starting up, but using dbPoll is, using it while joining causes this.