F
"Military grade encryption" is another one 
Actually anything "military-grade" is almost always used as a marketing term, not just in tech products.
Personally I always try to use noncommercial alternatives where I can, like Mastodon for example. It's so much saner when they're not trying to sell you something, like the listings here - https://www.directory.trade-free.org
And people should donate to these good projects to support them.
Do you think Proton's marketing is a bit confusing here? They keep saying their emails are encrypted, I assume what they mean is that they keep the info encrypted on their server. And maybe they also use end-to-end encryption if both the sender and recipient are using Protonmail - tho I'm not really sure about this one so correct me if I'm wrong.
I like how you break down these interactions, group 2 and 4 tells me how there is little room for nuance on social media. Unfortunately misinformation campaigns and fake clickbaity posts like these have gotten more popular over the years 
