The email program I use has code that segregates messages it thinks are spam and puts them into a junk mail folder which is emptied periodically. I usually pay no attention to this stuff as it is always porn or whatever. Today I happened to open the junk mail folder and found an invitation to fill out an online secondary. It was sent to a group of people all at once and interpreted by the email program as junk. Another day and it would have been automatically deleted. Just a heads up.