How about removing some clicking steps, why not offer the reply links (optionally) straight in the email? Like: === Click here if you are attending http://invi

How about removing some clicking steps, why not offer the reply links (optionally) straight in the email? Like: === Click here if you are attending http://inviteup.com/i/abc123/YES http://inviteup.com/i/abc123/YES Click here if you are NOT attending http://inviteup.com/i/abc123/HELLNO http://inviteup.com/i/abc123/HELLNO Click here if you MIGHT attend http://inviteup.com/i/abc123/PERHAPS http://inviteup.com/i/abc123/PERHAPS === Also, I agree that you are on the right side of complexity. Start clean and add what is lacking.