> the type for whom the entire point of making things is to make money, not do something useful.
the fact that somebody is paying for said app implies that it is useful. Noone parts with money for an exchange that they don't find useful.
The idea that just because _you_ don't see it as being useful doesn't make it not useful.
If you suppose that the exchange ruins the world somehow, because there's some externality that causes harm to you, then it's a case of making such an exchange illegal through some democratic process, and have enforcement. Absent of that, i think it is totally legitimate, and that the person doing the entrepreneurial endeavor is just trying to improve their own situation. One does not have to have the purpose of "improving the world" - that naturally would happen as people exchange to make their own situations better.
the fact that somebody is paying for said app implies that it is useful. Noone parts with money for an exchange that they don't find useful.
The idea that just because _you_ don't see it as being useful doesn't make it not useful.
If you suppose that the exchange ruins the world somehow, because there's some externality that causes harm to you, then it's a case of making such an exchange illegal through some democratic process, and have enforcement. Absent of that, i think it is totally legitimate, and that the person doing the entrepreneurial endeavor is just trying to improve their own situation. One does not have to have the purpose of "improving the world" - that naturally would happen as people exchange to make their own situations better.