Pretty sure they are free now a days. Back in the day it cost money and was a lot harder to enter the Metadata
Discussion
Yeah it's easy to set one up. There are plenty of guides out there one can follow if they don't know how. Every website should have one now days. You don't necessarily have to do it if you just put up an info page but if you're handling user data you definitely should.
It used to be much harder back in the day. But very easy now a days.