I don’t think I know anyone who buys them on a regular basis

Seems to be a lot of peope that do the postcode one, and the fact that it’s traditional lotto is so pushed in shops, and the fact it manages to keep rewards so high, suggests that a lot of people buy-in to it. Plus almost every neighbourhood high-street where I live has a betting house - I guess that’s an improvement though, because there used to be one for every neighbourhood.