"To become an International Super Randonneur, you need to complete a Super Randonneur series (i.e. 200, 300, 400 amd 600km) under the Randonneur Mondiaux code. Each ride must be in a different country. This can be done over any period of time. Elevated ISR awards are also recognised, for rides on different continents and of more than the minimum distance, for instance a rider completing three 600km rides in different countries in Europe and one 1000km in North America would be designated a 2 Continents International Super Randonneur 600."
So, it's maybe because the events are not "Randonneur Mondiaux" and I've not applied but I've effectively done it already.
"To become an International Super Randonneur, you need to complete a Super Randonneur series (i.e. 200, 300, 400 amd 600km) under the Randonneur Mondiaux code. Each ride must be in a different country. This can be done over any period of time. Elevated ISR awards are also recognised, for rides on different continents and of more than the minimum distance, for instance a rider completing three 600km rides in different countries in Europe and one 1000km in North America would be designated a 2 Continents International Super Randonneur 600."
So, it's maybe because the events are not "Randonneur Mondiaux" and I've not applied but I've effectively done it already.