Is there a clear etiquette on providing full text paper when you are a coauthor? As a coauthor, I occasionally receive requests for full-text pdfs of research I have worked on in the past (vis Researchgate for instance). Thus far I have generally ignored those requests - leaving it up to the first or corresponding author to reply.

However, when these requests lay dormant for a while I would like to know what the etiquette would be for providing the full text as a middle author?

Advantages:


Share my work more widely, also increases visibility for the first author/senior author.
Coauthors may have drifted away from academia, or not be on the platform.


Disadvantages:


Not sure of the interface on Researchgate - but if they have explicitly ignored the request and then I accept it I have acted against their interest.
It's your paper, even if you are just a co-author.  I can't imagine why any of your collaborators would not want to share them.  Keeping in mind that not all journals are accessible to everyone, I see no reason not to promptly acquiesce, even if  you are not the corresponding author.