Open access to research results is one of the fundamental principles of scientific development. Increasing attention is being paid to the Diamond Open Access (DOA) model, which creates mutually beneficial conditions for both authors and readers. Researchers can publish their work free of charge, while readers gain open and unrestricted access to scholarly publications. At the same time, a logical question arises: if authors do not pay publication fees and readers have free access to articles, how can a journal ensure stable operations? High-quality publishing requires resources for editorial management, technical support, indexing, and archiving.