This seems tailored toward the unemployed, students, or simply those with ridiculously flexible work arrangements that I can't even fathom.

Pretty sure most of SIAI's visiting fellows so far have been unemployed or students--based on my experience with the fellows program, it's all-consuming in the sense that the fellows do most of their work and recreation in close proximity to other fellows. (And the fellows program used to be a summer fellows program, for what that's worth.)

A friend of mine pointed out that the folks that were part of the fellows program didn't seem terribly practical or results-oriented, and I suppose in retrospect this selection of unemployed folks could have been the reason why. (Come to think of it, when I knew people in the summer visiting fellows program, there were a few who were practical and results-oriented--I suppose this might have been a result of their falling in to the "student" category instead of the "unemployed" category. My friend only had experience with folks in the non-summer fellows program.)