The purchase of a parking pass is voluntary, there will be no enforcement. Volunteers, organized by Nordiq Alberta, will be at the parking lots to provide information. This has nothing to do with Alberta Parks, as they opted out of funding grooming, although current Parks staff are operating the grooming equipment. The paid parking only applies to people actually using the groomed trails, if you don't walk or snowshoe on groomed trails, this is a non-issue.
Are you sure about that? I find opposing info online. I.e on Calgary Herald
A one-year trial with Nordiq Alberta will require skiers to pay $10 a day or $50 for the season to use trailhead lots at Peter Lougheed, Spray Valley and Sheep River provincial parks and the Evan-Thomas recreation area
This does not sound like voluntary to me. However in different post:
A voluntary parking pass program in Kananaskis Country will cost cross-country skiers $10 a day, or $50 for a season pass, and will support grooming on popular ski trails in the area
The new voluntary parking fees will help Nordiq raise the funds and reimburse Alberta Parks for the grooming operations.
it indeed sounds like an option.