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What would be the best schema markup to add to a case study? I am somewhere between choosing an 'article' or a 'review'. A review is not really right though, because it's not a customer leaving feedback, it's the company's take on their performance. Any opinions?

Our developers are moving away from utilising robots.txt files due to security risks, so e have been in the process of removing them from sites. However we, and our clients still want to run Moz crawl reports as they can highlight useful information. The two sites in question sit on the same server with the same settings (in fact running on the same Magento install). We do not have a robots.txt files present (they 404), and as per Chiaryn's response here https://moz.com/community/q/without-robots-txt-no-crawling this should work fine? However for www.iconiclights.co.uk we got: 902 : Network errors prevented crawler from contacting server for page. While for www.valuelights.co.uk we got: 612 : Page banned by error response for robots.txt. These crawls were both run recently, and there was no robots.txt present. Not to mention, they are on the same setup/server etc as mentioned. Now, we have just tested this, by uploading a blank robots.txt file to see if it changed anything - but we get exactly the same errors. I have had a look, but can't find anything that really matches this on here - help would really be appreciated! Thanks!