I'm using Wordpress to support two websites. One is a personal opinions blog and the other supports and publicizes the activities of a non-profit advocacy group. I'm retired and building and operating these sites is largely a hobby for me. I'm definitely not out to make any real money out of these sites. Both sites are largely aimed at Californians; and not expected to be of any interest to people outside the U.S.
Given that background I'm really curious about the motives of visitors from outside the USA who try to register as a subscriber at either of my sites. Many of these attempts are clearly from would-be spammers who obviously have no interest in my content. Those are fairly easy to identify with anti-spammer tools I have installed.
But I realize not all foreign would-be subscribers have evil intentions. I, for example, am interested in motorcycles which can be driven by a person in a wheelchair (I'm an electric wheelchair pilot). One of the more interesting ones I've found is made in the UK. So I'm interested in keeping up on its development. And it just might be that someone in China is interested in a native's views on California politics.
For now I have disabled the ability of site visitors to subscribe to my sites. What I would like to find is a plugin which would present a person trying to subscribe with a questionnaire about why they want to. Based on my satisfaction with the answers received I could then decide whether or not I welcomed my new subscriber or kindly declined their subscription. I haven't been able to find such a plugin. Does anybody have any suggestions or ideas?