Jon Buchan runs a digital marketing agency called Render Positive. He uses unconventional and humorous cold emails to pitch his services and ideas to potential clients. One such email included dressing up a ferret named Colin and attaching its photo. This unusual approach helped Jon get the attention of potential clients and get coverage for his graphics in publications like VentureBeat. His emails emphasize being entertaining over pretentiousness and aim to stand out from typical agency pitches.