Are you thinking about multi-resort passes like the MCP or the short-lived MAX Pass?
With Indy, it may be too soon to tell. I know that for Massanutten and Bryce there were people who checked them out last season with Indy who otherwise wouldn't have considered it. I'm guessing the same happened in the midwest for sure. Not a big number, but still new revenue to those ski areas.
What happens in the northeast is not the same as other regions.
Since this season is completely weird due to COVID-19, not sure the numbers will be a useful predictor for the future in general.
according to Doug fish, pats peak did a survey of Indy pass users at pats peak, they asked one question, have you ever been to pats peak, 90 percent of Indy pass holders said no. That’s impressive