Two things came to mind:
- Amway
- Some zombie cult
I got the name of this organization, and sure enough the internet tells me it's a brainwasher sort of cult, where the sessions cost a packet each time. Whenever there's any kind of proselytizing, you can bet something's up.
Hint : Any acquaintance/friend/neighbor that shows up suddenly and tries to get you to:
- attend a 'session', and
- says how it changed their lives,
- asks you to confirm attendance, and
- then says no obligation to join...
... is in a cult.