Charge more! My product[1] was originally free, then $49, then after a year I started to bump up the price more aggressively. It's now $249 and I probably should have started with that. Devs either aren't willing to pay for boilerplate code (happy with open-source options) or $249 is nothing to them if it saves a week of dev time. Last year I hit my goal of $100k in revenue :)

1. https://divjoy.com