Does the hotel put a hold on the cost of the room plus incidentals? What is usually the hold amount? $50 or more?

Starwood began putting $200 authorisation holds for even one night stays in Toronto.

Anyway, just wondering what the procedure is here.. for Canada and US travel?

Where do I pick up my key? And then also do online check out? Do I do it before I leave the room or after? Or if I don't do it, does it matter?