I just realized that I was thoroughly confused when making my original post -- instead of clicking your logo, I googled your name and ended up at a US company by the same name. Now that I see your instaff.jobs site I can clearly see the tech focus.
Do you plan to remain solely focused on trade fairs and such? Did you focus on a narrow niche just for the SEO and client acquisition aspect? Are you planning to expand into other areas now?