>Under the agreement, all articles with a UC corresponding author published in more than 2,700 of Springer Nature’s journals will be open access by default, with the UC Libraries paying a portion of the open access fee on behalf of all authors. Authors without available research funds for the remainder of the publishing fee can request that the Library cover the entire amount. Authors may also choose to opt out of open access publishing if they wish.
However, this seems to be severely limiting. So basically all research projects have to redirect funds to cover part of the "open access fees" or they have the dubious option to "opt out". The library only being willing to pay on case-by-case base means that there will be hidden disincentives in place.
Essentially that means that projects that are not willing to pay money to SpringerNature will be at a disadvantage.
I wonder which mechanisms were implemented to prevent them from arbitrarily increasing open access fees? This is conspicuously absent from the article.