To be honest I think the imperative for running this comes from the Manx government rather than any one manufacturer. I think they still hold the belief that by continuing with this they will become an international centre for an industry that no-one appears interested in (I'm excluding the electric car market from that comment!)
However, with 5-6 starters yet again (how many years has it been like that?) I really don't understand how anyone can argue for it continuing at the moment.