Can you explain why an app isn't valid collateral?
No explaination needed. Its the decision of the person who is lending you to decide whether it is a valid collateral or not.
Much better answer!
I plan on paying off the long-term loan, but just in case I don't/can't, the app will already be in your developer account, so you would continue to earn monthly passive income from it for months/years to come!
FYI, the app has income potential of 10x of the loan amount, since it has already created sales of around 7x the loan amount till now!
Dont offer it as collateral then or go to some other place to scam people.
You can't tell me what to do and what
not to do! ... Not everyone, apart from you, is here to "scam" people!

Banks (and the people who run them) are too dumb and technologically backward to understand apps and how they make money, that's why I am approaching the Crypto-community for help.
Yes and we as dumb as banks.

Please don't generalize and speak on behalf of the entire crypto-community just because
you don't understand something!