True, but isn't conditional not indicative of tense? Could this sentence also be, "That won't work for free"?
True, conditional is not indicative of tense, but "That won't work for free" is indicative future, not conditional anything.
English doesn't have a conditional future tense, just past and non-past.
"That would not have worked (yesterday), that would not work (today), that would not work (next year)" - the Esperanto could be any of those.
"That would not be able to function freely" irritating. Afraid I'd be punished for writing "for free" so I wrote "freely". ugh.