P.S.: to answer the question in my post below: regarding the webinar where I presented this file, a 50% discount doesn???t implicate the Robinson-Patman Act for several reasons: (i) the webinar is a service, not a commodity, and so R-P doesn???t apply; (ii) differential pricing to end-users not in competition with each other is usually not problematic; (iii) pricing offered days or weeks ago may n