You can use the thesis collaboration as a pre-recruiting service. If you like the students and see them as a potential fit in your company after the collaboration has ended, then you can make them a proper job offer. The thesis collaboration eliminates the time and money you usually spend on recruiting and it minimizes the risk of making a bad hire. Secondly, you get the newest research and knowledge on a topic relevant for your company, which the students will conduct for you. The results of the project may benefit your company to a great extent!