Yes, it seems strange that she not doing Paris, but showing up for Pronovias, but it's all about the money. Pronovias probably gave her a truckload of money for that appearance. I remember a couple of years ago, some time after Iselin "retired" to go back to school. She was barely seen for quite some time, while she was still quite sought after, then suddenly she turned up in a Pronovias look book. Money.