The phrase refers to the act of acquiring the software known as Paint Tool SAI without incurring any cost. It implies searching for, and obtaining, a version of the digital painting program that does not require payment. This might involve seeking out older, officially free versions (if available), or unfortunately, pirated or illegal copies of the software.
The desire for cost-free access to software, especially powerful creative tools, stems from various motivations. For hobbyists, students, or those with limited budgets, the financial barrier to entry can be significant. Historically, the availability of software, regardless of cost, has democratized access to creative processes and fostered innovation. However, acquiring software through illegitimate means poses ethical and legal considerations.