For the record, I not only paid my $70, but I lost political capital with my manager for forcing her to purchase seats for all the other engineers on our team who saw how much happier I was because of it. I do not advocate abusing the considerable latitude that Jon Skinner has gifted us. But I do believe that he meant to be as generous as possible with the plausible ambiguity of the word "evaluation" as he uses in his license terms. the response to the FAQ seems to confirm that.