It's very similar, though there are some significant gameplay differences. But from a visual perspective, compare Bejeweled[0] and Candy Crush[1], then look at Action Candy Swap HD Pro[2].
[0]: http://appshopper.com/games/bejeweled
[0]: http://appshopper.com/games/bejeweled
There are a number of workaround for this, and one is to upload the same game with slightly different title until you hit on the magic combination that gets you sales. It sucks to have worked hard on a game, and it fails because of the wrong combination of title and keywords.
I agree that that's likely the main idea, but there's real value in providing different themes. I like jewels more than I like candy art.