I saw this in the news and thought it was very cheeky. I am all for web hosts to try new ways to monetise/finance their sites.. and if this method involves crypto currencies then all the better.
They SHOULD HAVE told people about it though...
I agree if they informed their visitors about this maybe they will be able to provide good explanation for such action, they already have an established name
and giving enough info about this will let the people/ visitors to understand how it will help the site to continue surviving as they have knowledge that in
order to facilitate funding is a must in every website that has been existing, another open idea for crypto industry.