>It's probably full of stuff no advertiser cares about, like your love of old British railway cars As a railway enthusiast myself, I would say that's actually

>It's probably full of stuff no advertiser cares about, like your love of old British railway cars As a railway enthusiast myself, I would say that's actually an opportunity for very effective targeted marketing: * There are loads of specialized reference and historic books and video on the subject. * The crossover interest to model railways, a hobby involving many high-margin purchases, is very high. * Many enthusiasts literally plan their vacations around preservation railways and museums. Everyone from the tourist-railpass sellers to full-fledged package tour operators should be targeting them. If that interest is not well advertised to, it's either because they're doing a poor job identifying the interest and routing it to advertisers, or they've done a terrible job of fostering ad buyers in those verticals.