Firefox’s free VPN will offer 50 gigabytes of monthly data, which is pretty generous for a browser-based VPN. A Mozilla account is required to make use of it, which isn’t a hardship (they’re free), but is a point of friction some may wish to know upfront.
You are either going to donate, or spread word to others, who will pick it up and donate themselves.
Money still gets made, its just less opportunistic and predatory, and more a reward from those who can afford, to fund for those who cant.