The incremental cost for companies is probably small. Although, it would depend on what percentage of domains registered require customer support or other manua

The incremental cost for companies is probably small. Although, it would depend on what percentage of domains registered require customer support or other manual intervention. If a customer support request costs the company $20 and 1 in 20 registrations request support, then that's a dollar extra per registration right there. And there are still large fixed costs. You need security, rock solid infrastructure, outgoing email infra, executives, attorneys, offices, janitorial staff, and all the other stuff that goes along with running a business.