While I like the idea very much, one has to ask what evidence is there that the corporation behind this is actually structured in a way that it will be solvent to pay for hosting over the course of 100 years and to pay for the technical staff as needed to adapt content to whatever future network and hosting technologies may exist. (Web technologies have evolved tremendously from HTML 1.0 in the '90s; I can't even imagine what the Internet might look like in 2118.) Whatever that cost might be, I'd imagine that it's a lot more than $99 unless the site reaches Facebook-like scale.