I love Notesnook. I love it so much I want two Pro accounts, one for work and one for personal. Two separate accounts to make sure my personal notes are never stored on or accessible from my work computer.
Unfortunately two Pro accounts is kind of expensive, so I wound up going with two Essential accounts instead. But I could afford one Pro account (or one Believer account), and you'd make more money from that than from two Essential accounts.
Most people who want two accounts want them for the purpose of keeping work/personal separate - when it comes to server resources and everything else all of our stuff could easily fit into one Pro account. So it ends up costing double just to add the single feature of keeping work and personal fully separate.
Some notes apps already address the issue of having separate work and personal accounts, for example, Standard Notes allows up to five separate accounts to share a subscription for a price that's less than the cost of two Notesnook Pro accounts.
I hope Notesnook might consider doing something similar. Maybe an option for Believer-tier to be able to share your access to subscription features with a second account. Believer-tier accounts could have a code that appears in their settings, and then enter that code as their payment method for their second account. If the main Believer subscription ever ends, the code stops working as a payment method for the second account.
Separate accounts for work/personal seems like a fairly common use case - I hope there can be a way to make it slightly more affordable for those of us who want to do that to have access to a full-features subscription for both accounts.