I've watched 7 figure deals go through self-service onboarding before, zero touch. I think the sales team eventually reached out, but they were using the product before they ever had a sales call. They certainly will pay it without talking to you in person. There's an asterisk here though, which is that you have to be essentially the best player in your field and really well known.

I assure you that 7 figure deals happen every day on AWS, for example, without human intervention. Not all of them happen that way, but enough that it's not surprising.