This document discusses sustainability strategies for a statewide virtual reference cooperative after grant funding ends. It outlines maintaining a core group of over 200 participating libraries with support from the Illinois State Library and a statewide advisory board. Quality is ensured through ongoing training provided as accessibly as possible, focusing on basics like chat answering, follow-ups, and setting policy pages. While a larger decrease was anticipated, usage declined only 9% with continued service, possibly due to a lack of statewide marketing.