BTW, any idea whether the poor English of these scams is genuine or affected?
Amsterdam? You just reminded me of this.
These con artists use scripted or canned responses and are used to working a large number of marks in order to turn up a few that fall for it.
In short, you are expending a great deal of effort to be a mild annoyance. You can always report these to the ISP of the sender or even the FTC - but although both will claim to take these things seriously - they do nothing in my experience.
Wouldn’t these replies all just be scripted responses? I read them (though not carefully) and I don’t see anything that would indicate they have been uniquely formulated.