Complex sentence: Image thumbnails and improved search functions were key additions that made the Openclipart website more accessible, and accelerated use of the site, which was soon receiving over 5,000 unique visitors and 50,000 page views daily.
Split into simpler sentences: Image thumbnails and improved search functions were key additions that made the Openclipart website more accessible. These features contributed to increased use of the site, which was soon receiving over 5,000 unique visitors and 50,000 page views daily.