I think Engine Yard pays 3 people to be fulltime on the JRuby core team and 2 (not sure on that, certainly one) to be fulltime on Rubinius. Microsoft was suppor

I think Engine Yard pays 3 people to be fulltime on the JRuby core team and 2 (not sure on that, certainly one) to be fulltime on Rubinius. Microsoft was supporting IronRuby until a couple years ago.