One problem that I see is that conventionally developers will at least look over reports, so this goes against cultural norms. If you don’t know you need to pay, you might expect some initial feedback. Personally, I wouldn’t, as I think most projects absolutely suck at providing support.

I also have to wonder how badly this affects his sales funnel? Seems like a good way to make potential clients look for another project or developer to work with. This kind of attitude would be an instant turn off for me.