They had 250 employees, plus paid influencers, for a (predominantly) cycle routing app used in Europe. That’s why it was unsustainable. A realistic sized business would have been sustainable.
Absolutely yes. Just expanding on the point that the "scale" in question was how Komoot chose to run their operations, not the size of customer base addressed. Bending Spoons have, quite adroitly, figured that they can serve 90% of the customer base with 10% of the operations costs.