The person doing this is doing the good work.
Although, is anything really free? If I put half an hour into getting Binky's WooWoo RL working, and then half an hour into trying it, and decide it has no value or enjoyment to me, I've paid with an hour of my time and there are no refunds!
But there's tremendous value to making sure that some of these aren't lost. I know of two roguelikes for which the downloads are no longer available. I should look up their names and see if they're in there.