Re: Best advert ever
yes, that's true, I forgot: tuta lacks notification. And free accounts not used for six months are deleted. So, advantage for proton. Still tuta has its place for "special" purposes. ;-)
yes, lavabit, mailbox.org and posteo all cost. Huge amounts such as 15$/year (lavabit) or 12€/year (the other two). For more money you get more features.
I for one have paid accounts with ALL providers mentioned (incl. tuta an proton). And I can say: They are worth every single cent!