Emailing users when a new feature is enabled for their account isn't even the kind of thing that would distract an existing very busy developer.
You could literally hire an entirely new guy, give him instructions to build such an email system, and let him put the right triggers on the user account permissions database to send out the right emails at the right time.
And then, when it's built, you can start adding more features like sending the emails only when demand is low and/or at times of day when you get the best click through rate. And then next you can start measuring the increase in revenue from sending those emails.
Before long, you have a whole marketing and comms team. Which you probably want as a big company anyway.
The peanut gallery could (and does) say this about 1000 little features that 1000 different people claim to be so necessary that OpenAI is incompetent for not having, yet none of those people agree that those other features are priorities.
You could literally hire an entirely new guy, give him instructions to build such an email system, and let him put the right triggers on the user account permissions database to send out the right emails at the right time.
And then, when it's built, you can start adding more features like sending the emails only when demand is low and/or at times of day when you get the best click through rate. And then next you can start measuring the increase in revenue from sending those emails.
Before long, you have a whole marketing and comms team. Which you probably want as a big company anyway.