[seqfan] Re: For Fibonacci Fans

[Peter Luschny]

> This means for example that you could get different access if you click
> on a link compared to copying the address from the link and entering
> it yourself.  Actually this is a common way that temporary free access
> to journal articles is implemented: the server is told to grant access
> if you asked for the article using the link on the offer page, otherwise
> standard access conditions apply.

Right. The page says explicitly, with "via this page":

"The articles and book chapters below are free-access via this page up
until 31 September 2019."