They are in a large process of concentration of content through acquisitions and mergers. Publishers are facing challenging times too. They receive pressure from authors who push them to publish digitally in order to achieve larger dissemination of their works. But publishers' business is radically changing from producers of multiple copies for selling to producers of a unique copy and distributors of tailored services. In some cases they target consortia, in other cases libraries, and even the end-user directly.
Experimentation is overall, from pricing methods to technological protection measures.
In front of this bourgeoning movement, most libraries are behaving in a conservative way. They evaluate offers, they test, they accept and claim for access to publishers and aggregators servers, they promote this material. Libraries, specially university and research libraries, have to do this. Their users claim for access and they will get it, through the library or across the library. But most of these libraries do not ask, do not wish to directly manage this digital content and they leave volunteers this task to producers and to other commercial intermediaries.