> I expect them better support

I expect total ignorance from a typical domain registrar.

> If they have a customer like steam would they just cut off the domain? Probably not.

Take a look who is they registrar and then look their prices up.

> Other domain registrations would just ignored this and nothing would happened

Yeah, they would totally ignore their customer just like that one did.

Unfortunately, providing proper support and protecting own customers in digital realm is an unsustainable business practice for most registrars.