Quite a few have wanted to.
”Revenue from membership fees grew by 8% to $4.6 billion, and our membership grew to nearly 128 million cardholders, with a renewal rate of 90%.”

Quite impressive reading below. Learning from the best in the world is inspiring. There is still a gap in “warehouse club retail” in Finland. It would indeed be a surprising and exceptionally bold move if Tokmanni tried to fill that gap before Costco lands in Finland. That window seems to be open for a while longer, perhaps 5-7 years. They are already in Stockholm.