I believe in, and am a big proponent of physical 2FA being widely adopted -- though I own a half-dozen YubyKeys, I do wonder what their profit margins are. They feel a lot more expensive than they should be.
> though I own a half-dozen YubyKeys, I do wonder what their profit margins are.
I hope they are huge while the products stay affordable. A cursory check suggests even yubico's product line are on the market for around $30/key. This is hardly expensive.