Make the walkthrough an _**UNSUPPORTED**_ and 'use at your own risk' only article. The only requirement for actual changes to the protonmail apps / server / website is to implement the 'sub keys' feature, which is already available in open source tools such as Matrix and/or KeyBase. This would be a long walkthrough, but more people would end up wanting to pay after seeing the walkthrough. See my suggestion about implementing 'sub keys' for additional devices and offering a detailed, advanced walkthrough for how to **Manually** setup the key pair and sigs on a desktop and how to manually decrypt/encrypt the mail stream. Soon as I have a job again (health and economy willing) I will most likely immediately pay for 10 years of Visionary subscription! (When I work, I make low to mid 6 figures). I cannot afford to pay even $1 per month to anyone but my landlord. I no longer have my own internet, so I am using public wifi and have to conserve battery on my phone and laptop. I would absolutely pay any price for the Bridge software! HOWEVER, I am BROKE and near eviction (thanks covid).

Protonmail smtp without bridge