As we are used to how exchanges operates and make profits from different routes operating their platform and how they charge for listing of coins, trades and so on.

Now am not sure of how some of our developers are making their own profits by creating non custodial wallet for the bitcoin community users to enjoy, as Bitcoin wallet are free to download and use.

This is the reason why I feel like throwing my question to this section to enquire and hear from our feedbacks.

My question is simply and direct

How do Bitcoin Wallet developers make profits from creating Wallets.? (Non Custodial Bitcoin Wallets).