The history of OpenAudible is marked by its transition from a fully open-source project to a paid tool. The developers cited the high cost of maintenance—both in time and resources—as the reason for this shift, noting that the original donation-based system was insufficient to sustain a high-quality product. Is OpenAudible still fully open source? #659 - GitHub
Obtaining a license code for OpenAudible is easy. Simply follow these steps: openaudible license code