I received a bounce back from fastmail earlier saying my domain doesn’t resolve, checked cloudflare and it’s all there but dns resolution for my domain and even for the registrar https://get.mp no longer resolves either.
ICANN charges a $25000 per year maintenance fee for Top Level Domains so a few unpopular TLD's have gone out of business and ceased existing over the years.<p>Anyone can apply to own a TLD, the application fee is about $180,000, but you will spend lots more on lawyers and lobbying. The chance of success depends on existing trademarks and suchlike.