[pocketarc]

By giving it to Wordpress, it's done, you don't have to think about it anymore, and whatever happens in your life, that content is staying up for those 100 years.

You're paying for the security / peace of mind, and I'm sure you can picture some people preferring to do that than to self-manage hosting content (and updating technology over time) for 100 years.

Edit: Having said that, I don't think Wordpress is the right fit for this. I think it should've been a separate company, with a separate brand and a separate legal structure that enforced keeping things up for 100 years and enforced using the investment profits to keep the content up and maintain the infrastructure even as technology changed.