As a personality test product, this is not cheap. Most companies probably try to use it for a one-off event, in which case, the fact they force you to sign up for a subscription is really odd. Second, if you don't remember to turn off your subscription, even if you email 5 hours after getting charged, they won't refund the accidental renewal.
If you buy this product, remember to cancel as soon as you start the subscription (you still have the rights to use it for the rest of the month). Otherwise, when you write in, you'll get a response like this:
"Please note at the onset of purchase, the materials were listed as a renewable subscription. Per our Teams policy (https://www.16personalities.com/terms/business), we do not offer refunds for partial/unused months, I'm afraid. It looks like you successfully turned off the subscription renewal today, though, so you will not be charged again moving forward."
For a product that's intended to facilitate better teamwork and communication, I find it particularly ironic that they would treat their customers with the kind of unaccommodating practices that they're hoping to reduce through their product.