What is the purpose of self-archiving?
The purpose of self-archiving is to make the full text of the peer-reviewed research output of scholars/scientists and their institutions visible, accessible, harvestable, searchable and useable by any potential user with access to the Internet. The purpose of thus maximizing public access to research findings online is that this in turn maximizes its visibility, usage and impact — which in turn not only maximizes its benefits to researchers and their institution in terms of prestige, prizes, salary, and grant revenue but it also maximizes its benefits to research itself (and hence to the society that funds it) in terms of research dissemination, application and growth, hence research productivity and progress. This is why open access is both optimal and inevitable.