I'm under the impression that event insurance rates are prohibitive and that it's much more cost-effective to 'join forces' than to try to sponsor a strictly 'Scottish' or 'Irish' event. When the insurer hears 'hammer throw', 'caber toss', or 'stone put' in combination with 'beer', 'whisky' and 'wandering spectators' they tend to quote $ figures that could purchase an ambulance or two!