Have you considered offering an attractively-priced Lifetime Family plan? I would find that interesting... 

Enpass is offering a 25% discount on the Family Plan, and you can find all the details on the official website: https://www.enpass.io/pricing/

The Family plan is available on a one-year recurring payment basis and not as a life-time payment plan.

Well yes, but I was specifically suggesting a very attractively-priced Family Plan of Enpass. Consider that for young users part of a family plan, Enpass may be their first/only exposure to a password manager. That's an opportunity to make a good impression and a fan and loyal user.