The Saltspring SPCA website also has no reference to feral cats.
I have heard recently, that they have a volunteer who socializes feral kittens, until they are ready for adoption.
But Saltspring has a very small facility, with young, old, and developmentally disabled people going in to do volunteer cat cuddling - it's possible that they have adult ferals in that same space - but they would have to be caged, which would be a living hell for the animal.