A long-standing problem with open data projects is that they are not free to run, but companies tend to heavily exploit the data for their own profit without providing any funding to the project, and any technical restrictions on that would also harm the legitimate users.

So here's an idea that just occurred to me: charge specifically for CSV and Excel exports. JSON/whatever exports and feeds are free and unrestricted, but CSV/XLS requires contributing to the project. Because as far as I can tell, 'business environments' are pretty much the only place where people would *willingly* choose CSV/XLS over standard(ish) serialization formats.