What are the benefits of using those sites?
I’ve heard Yahoo! is good for stock market trading and financial news, but haven’t heard anything else about any of them.
To use your own domain with Proton is paid. So you have to pay for a Proton and your domain in order to do that. It’s really too bad because it would be fucking awesome if I could use my tor hidden service as my domain. That way I didn’t have to pay for it. So my email might be like contact @ blahblahblah.onion.