Earlier quoted context omitted.
This reads like you're suggesting to not even try. IME trying new things is a great way to learn. Also, if a dev can close a few sales, just the first few, then they'll know how to help their sales staff. Try a little, see if you can grow.
I wish people didn’t have such a knee jerk reaction to my advice, but for many years I too believed a dev should at least try to wear many hats. All it took was seeing how professionals always do the job far better to change my mind. It doesn’t matter if a dev picks up some skills, if you plan to be a dev then a dev is all you’ll ever be, focus on the development and let sales worry about sales. I see a lot of founde…
OP has a product he enjoyed making, is providing real world utility, and that he isn't trying to turn in to a billion dollar company. The obvious solution is for him to pick up a phone, send out a few emails, and generally reach out to the local business community instead of sitting back and waiting to see if it will magically make money and he can hire a sales person to do those tasks instead for his hobby project that has grown too expensive for a single person but would barely qualify for justification at a business.