--On Wednesday, July 10, 2013 14:50 -0400 Donald Eastlake
<d3e3e3(_at_)gmail(_dot_)com> wrote:
The IETF values cross area interaction at IETF meeting and
attendees have always been encouraged to attend for the week.
Allowing one day passes is a recent phenomenon to which some
people, including myself, are on balance opposed.
I would add that the registration fee covers a number of IETF
expenses that are fixed and independent of the number of
people-days at a meeting. So, independent of Donald's concern,
even if one were to use a formula similar to the one you suggest
it would be more like
(1/5 * day-cost-part-of-fee) + fixed-expense-part-of-free
or at least a much larger fraction of the latter.
john