Gargari

With ProtonMail filters you can do the same. Custom domain with all-catch address, use [email protected] and use filters to send them the desired folder, or spam or delete it

Without any proof, no peer review. It's a fraud.

No APK (Android) ?

Adguard

Is it a simple chat app or something like Telegram with channels and groups support?

Don't think so, can you elaborate?

LocalMonero and Bisq is goto

That's a lot of new features

What are the exact benefits of running nodes for the network? I have several spare servers I would run 5 of them. I do run 1 already. If that matters I could run many of them via Docker

Can I use it from EU?

There are ways to do it on a rooted phone, many did. Use a different account for it.