1) I have nothing to do with Archive.org, I'm just speaking from a UX designer's perspective. "Designing around" constraints is something everyone involved in a site build does, from backend engineers to designers to front guys to DBAs. You're presented with a set of constraints, and you come up with solutions that fit those constraints. Nothing evil.

2) There's nothing inherently wrong with "consume, consume, consume". I don't think anyone in the world would argue that Pinterest is evil or bad. It's a site for consuming en masse, plain and simple, and an infinite scroll enhances the experience. Clicking "next" 50 times would significantly ruin the user experience on that (and similar) sites.