Board Thread:General Discussion/@comment-61022-20150515120719/@comment-4651179-20150518062230

I don't think it would be really necessary. This message (and another one from earlier) will always appear once in the notification box of any user who enters this site, so even if somebody becomes an user in August, the message should still appear, if I'm not mistaken.

Additionally, because of the nature of welcome messages (being nothing more than automated messages), most of them are ignored.