I thought it was amusing that they chose to show off the iPhone using a delivery guy on a motorbike, with the iPhone mounted on the handlebars, especially after warning people not to do that: https://support.apple.com/en-us/HT212803
Example subsidy: In NYC, street parking in most residential neighborhoods is "free". This is a subsidy paid for by taxpayers, 55 percent of which do not own a car. These parking spaces take up 500 million square feet of public space. That's a lot of free real estate for storage of private property.
Your gmail friend gets a link to their "secure inbox" that they can only view by providing the password you assigned them when you sent them the email. It's a shared password that you need to provide them by _some_ means. I believe the encryption and decryption is all done in the browser (yours and theirs), so tutanota never has the plain text.