Not just in billing, but also in implementation cost and general overhead. I actively avoid buying anything which requires talking to a salesperson to get basic service info; ideally one has something like the Cloudflare self-service model with enterprise upgrades. I know someone currently paying >$800k/yr to Cloudflare who started out a couple years ago with a $200/mo plan.
This is setting off all of my "enterprise trash software" alarms. And if there is one thing those all have in common, it's being way too expensive.