Domain name cost?
How much a year does it cost the owner to keep the domain alive? £20 a year inc their own Admin costs, plus a once off script to move the existing accounts to a currently maintained server?
It's about branding and income. If a service doesn't make money and isn't current corporate branding it will be axed.
The alternative to zero privacy "who knows where hosted" email is your own domain and hosting package with a smaller known National datacentre. Move it when they can't tell you what country it's in.