crypto space is making use of the new ICANN approved TLDs pretty rapidly
their customers are on discord, twitter, telegram and wechat so email delivery is not a factor
the entire sites and revenue drivers are entirely client side (with the "servers" being the smart contract methods stored on the nearest blockchain nodes, this has only one initial upload cost but functions similarly to lambda functions except the users pay for the computations), when the domain is down or blocked, the user can interact directly with the nearest node hosting the website's associated smart contracts, if they are interested enough
this is working really well for a lot of organizations, and it has been this way for several years now
makes lean SaaS services even leaner, and allows them to grow even faster - as long as their customer base is already a crypto native. I haven't seen any organization succeed if they have to sell their customer on some crypto browser extension.