The three
I keep a journal: log your days, count your lock, and share it with a keyholder if you want to. I'm a keyholder: you do not log, and you see what the people who share with you have chosen to show you. Both: your own journal, and the people who share theirs with you.
Switching
Switch in Settings, under How you use chastity.report. Nothing is deleted when you switch: a keyholder account keeps any journal you kept before, out of sight, and brings it back if you switch again.
A keyholder-only account has no trial, reminder or evening email, since there is nothing to log.
What it never changes
A mode grants nothing. As a keyholder you still see only what each person switched on for you. And whatever your mode, once somebody shares with you, their page is on your Subs tab.