I agree! It's a stupid buzzword and I don't like it either. Problem is, I tested a couple titles with friends and this is the one which they immediately understood. Maybe I should've gone with your idea - FaaS is a good description.

But yeah, you're right. It's just someone else's server, which for the purposes of my tutorial means you can host a simple, stateless function for free, i.e. no Linux box to provision, no SSH, no uptime monitoring, etc.