I recently a started a new url shortening service - http://hop.im I am thinking of making all the links a 302 temporary redirect. So what will the marketers prefer? 301 redirect or a 302 one? And why? Thanks in advance...
I doubt most marketers will have the first clue about status codes, so won't be able to answer the question. I can't think of a valid reason for using either 301 or 302 on a short URL, apart from linking from one page to another on the same site (which would raise a duplicate page flag with Google). But I can't think of any reason to use a short URL within a site. So now I am curious about why you're asking the question and/or what the benefit is to the user?
Well 301 redirect is preferred more by marketers as they want the Google Juice whereas if you use 302 redirect it's just a temporary redirect.