Doing a fair amount of travel, I am on all of the SNCF spam mailing lists, which is not necessarily a bad thing. For example, when the Thalys sale starts, you can be ready and pick up return tickets to almost any destination serviced by them for under 40€. Thanks to one of these sales, I found myself with a weekend in Antwerp, a city that to me at the time, aside from being a historically important place, was known primarily for diamond-trading and fashion.