To clarify:

ProtonMail. I don’t hate it, but their choices in what to monetize is bizarre to me, like the ability to make more folders than three, you have to pay to have more folders. Also, it’s not a perfect mail system, you’re going to not get or be able to send 100% of mail because there are mail services people or businesses use that simply don’t register when using ProtonMail.

In an age where there are tons and tons of things out there that is a subscription, paying for the ability to have more features that have been normalized would turn off some people.