I have both types (keyword prefixes and suffixes to "cloud" domains) and based on sales as well as inquiries, while the cloud + keyword pair is selling more than "keyword + cloud" names, they definitely get attention and a few sales, and aren't bad in the way that there's no interest or that it's a bad idea.
One example is Marc Andreessen's first company after Netscape in the 90's was called LoudCloud (later Opsware, but still), and that was in the 90's with a keyword that wasn't even very descriptive of a specific category. You can just imagine the value of these things today. Everybody tries to deny and even diss the "cloud" (even Oracle's Larry Ellison a couple of years back saying it was nuts, only for Oracle to start capitalizing on the cloud lately), but eventually give in to the obvious value in them, in this case, including good keywords with "cloud" in them, whether they be before or after the word "cloud."