Complex sentence: The agency employs a full-time staff of 17, and up to 100 freelance contractors at any given time; by hiring independent contractors, Hub is able to pair its clients and creative staff on an "ideal-for-project" basis.
Split into simpler sentences: The agency employs a full-time staff of 17, and up to 100 freelance contractors at any given time. By hiring independent contractors, Hub is able to pair its clients and creative staff on an "ideal-for-project" basis.