When creating an "Advanced Authority" earlier, I don't recall they say it's gonna incur charges. But now it does (just checked after I got the invoice).
I'm not really sure how to act, in most of reputable services I shouldn't be able to create fee incuring services before validation. This looks like some dark pattern to me.
Also, I believe we have some front end changes that are going to make things a bit more clear when using advanced authorities. Sorry about that!
Hopes that clarify things. Sorry the invoice was unexpected. Please send an email to support@smallstep.com so that we can lookup your team and correct the issue. We'd do the same for any trial user - No public post needed :-)
If they don't comply, perform a chargeback through your bank or credit card provider.
Pay it close the account and do something worthwhile.
It's not worth the principle of the thing.
Good luck.