For me the point is that if you're choosing a service provider whose only offering is that particular service (e.g. Fastmail, pCloud, domain.com, ...) then the

For me the point is that if you're choosing a service provider whose only offering is that particular service (e.g. Fastmail, pCloud, domain.com, ...) then the chances of being treated as a customer and getting some level of service are orders of magnitude higher.