Comment by kiwih

As an academic and regular submitter to arXiv, this is an eminently sensible policy. I like that it's per-submitter and not per-author, that means that the big labs with large collaborations shouldn't be terribly put out (more authors = more submission budget).

I hope something like this could also be adopted for some of our larger conferences - the absolute limits on co-authorship are what seem to cause the most grumbles.