Things in the world aren’t free.
Did I write that? I explicitly wrote he can keep 1/3. It doesn’t make it free at all, knowing the other 2/3 going to the Lemmy devs and instances. Nothing is free in this model. It’s about the fairness.
1/3 isn’t arbitrary. You have 3 parties here, the app dev, the lemmy devs and the lemmy instances. The first relies entirely on the second and the third, who are in a donation model. Without these two, the first is at best useless, therefore giving 2/3 to the other parties is fine. Cutting the revenues of the app in 3 for each party is fair.
Relying on the donation of others to the Lemmy dev and instances to make profits is way more greedy. It is even parasitic on one side.
People not donating is a thing but they don’t make profits. It’s a huge difference on the greedy scale.