(Comments at https://news.ycombinator.com/item?id=5434186 - the actual site has been taken down)
I decided to stop working on this visa list / forms idea. I think I could make a bit money from ads (hotels, airlines, etc.), but I can't think of any subscription models, and I personally wouldn't pay any one-time fees just to fill out some forms. I think most people would rather use a pen than enter their credit card details.
It would also be far too much work to organize all of these application forms and stay up to date with visa requirements. I just wanted some passive income and wasn't ready to schlep [3].
But I think it could be done with VC funding and a team of salespeople and immigration experts. You need people calling or emailing embassies, or visiting them in person, and making sure that they know about these filled-in forms and are willing to accept them. I was also thinking that I would eventually build a SaaS service for every embassy, so that people could apply online and track their applications. Could start with filling out the forms, and then eventually digitize the process and cut out the paper. But I was worried about turning into another online visa agency where I was just a middle-man. That's a service business with low margins, and it would be easy to settle into that and get stuck there.
Anyway, it's a huge project, so it's not something I could do by myself. Also trying to sell software to government and immigration agencies is a really bad idea (from personal experience.) But maybe there's an opportunity here, so let me know if anyone is interested in working on that.