I don't understand why Shutterstock has a login captcha. It seems like a waste of time. Captcha's are usually used for example when signing up as a new user on a web site or posting a comment on a blog to ensure the user is not a bot. But when you have already put in your login details to login to a site that already confirms you are not a bot if you have a username and password already. How could one be a bot if they are a member of a site already? It makes no sense. Shutterstock should remove the captcha from their login dialogue box. No other stock site has this either.