Am I missing something obvious here? What would change if this piece of software/algorithm was ported to Ruby? I mean Rubyists would get to use it, but what els

Am I missing something obvious here? What would change if this piece of software/algorithm was ported to Ruby? I mean Rubyists would get to use it, but what else would change? This whole thing seems very strange, like if someone would create a cure for a disease and give it out for free and tell everyone how it was made but insit that he be the one who injects every single patient personally.