Wikipedia minangka conto sing apik babagan layanan bebas perdagangan. Dheweke nawakake ensiklopedia online lan ora pengin bali. Aku ora kudu menehi dhuwit kanggo ngakses Wikipedia, Aku ora kudu perdagangan data sandi, manungsa waé utawa liyane, amarga padha ora duwe tracker utawa iklan. Saka course they need money to sustain themselves in this trade-based world, but they make this voluntary in the form of donations. So if you can and want to support them, you can do so, if not, then you don’t have to – you will still have access to Wikipedia.

I think that’s the closest TF service as it can be, and it’s always one of the main examples. It’s collaborative, educative, and reliable resource used by the whole world. They don’t have ads, and also have a policy about NOT advertising. They run by donations.