Your comment is an interesting reflection to me of the expectations people have for cheap or free software. You were willing to invest your time and schedule into seeing this talk live, which for many people is a much larger investment than $10. My default assumption of folks on this board is that they're well-off tech workers, which would make it seem even starker in comparison to $10.
My comment isn't anything about you personally, and I've had similar reactions to even cheaper software. But it still find it striking when I think about it more.