It's not that hard to monetize interest in damn near _anything_ (as long as it is not clearly illegal, I guess). For the two examples you've posted, maybe adver

It's not that hard to monetize interest in damn near _anything_ (as long as it is not clearly illegal, I guess). For the two examples you've posted, maybe advertise flights/vacations to Singapore if you show a persistent interest in Singapore, and market model rockets, space flight simulator toys, really all sorts of consumer-grade commodity products adjacent to the space industry.