There are multiple models of Open Access:
PLOS Open Access logo is decided into the public domain using a CC0 dedication.
Benefits of Publishing Open Access by University of Waikato Library used under CC BY license
By making your work available through OA:
Huang, C.-K., Neylon, C., Montgomery, L., Hosking, R., Diprose, J. P., Handcock, R. N., & Wilson, K. (2024). Open access research outputs receive more diverse citations. Scientometrics. https://doi.org/10.1007/s11192-023-04894-0
Piwowar, H., Priem, J., Larivière, V., Alperin, J. P., Matthias, L., Norlander, B., Farley, A., West, J., & Haustein, S. (2018). The state of OA: A large-scale analysis of the prevalence and impact of Open Access articles. PeerJ, 6, e4375. https://doi.org/10.7717/peerj.4375
Schultz, T. (2021). All the research that’s fit to print: Open Access and the news media. Quantitative Science Studies, 2(3), 828–844. https://doi.org/10.1162/qss_a_00139
OA models are classified using a color system:
"Open Access Is and Open Access Is Not" by Open Access Australasia used under CC BY 4.0 license