In this logo the image and the S both connect the company name to the graphic. Since the image and the text are related one helps to reinforce the other so that the name is easier for people to remember. In branding the goal is to make your logo unique and easy to remember, not necessarily to show people what you do with tiny pictures. It is always good to search all of the logos in your area, then avoid having something that looks really similar to the logo of another company.
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Marketing contact: jessica@internachi.org