alt Hacker News> whose customers will not approve a deal by email only
That's kind of begging the question. Part of the point of the thread here is that it seems B2B is leaving some money on the table by refusing to do deals with less interaction. For example, this CTO's comment [1].
A good comparison I think is AWS and other cloud offerings. Of course, past a certain spend, you will start getting calls and have the opportunity to negotiate better rates, SLA's, etc. But, you can just go and spend 5-6 figures per month without any human interaction.
Another good example I think is 5 figure (or maybe even 6 figure) equipment purchases. You can definitely go ham buying most professional equipment without having to talk to someone over the phone. Think servers, GPU's, storage, cameras, etc.
It'd be great if more services offered this.