Why would anyone share their secrets with you?
What guarantees do I have?
Also, it's not just for secrets. It's for business too.
Think you are running a SaaS and something happens to you. What will happen to the business? Someone has to know what you have to do to run the server, to manage the database.
It's like having a backup with you forever so that your family can get your journals, "how to run my business" stuff ready.
For one time payment, I agree I will need to implement that.
What feature do you think would be better for bringing trust to you and all users? Because I agree there could be a huge trust issue. I will encrypt the data, but would people trust it?
What about $2 per month to try, if the user likes they can move to $149 lifetime plan?