Yes, the rumors are true. Developers also have to eat. They also have limited time.
And yet some of them decide to use their free time to develop free software.
You can help the development of Profanity and show your appreciation by donating.
There are several ways to do so:
1. Become a sponsor on Patreon
2. Become a sponsor on GitHub Sponsors
3. Write an email to firstname.lastname@example.org to ask for bank details