I can think of lots of ways to eat 80% fresh produce on $1/day, at least by the post's standards.. a plot of dirt, a short skirt, etc.

Those are the things he gave away. If you read a few of his posts, he mostly eats sandwiches, fruit, vegetables, and eggs.

The full list of what he bought is at the end of this post: http://www.grocerycouponguide.com/articles/eating-well-on-1-...

He mentioned in a comment that the point isn't that anyone should do this, just that it's possible. With much less effort, one might be able to cut their grocery bill in half.

That's a list of things he said he gave away, not necessarily what he was eating.