> "or any other company's services" is a bit to wide, the obvious biggest counter example to this would be utilities, everyone is somewhat entitled to access to their power company's services. But going outside utilities, what if I live on an island that is serviced by a single ferry company, shouldn't I be entitled to paying service?
True, your 'island ferry example' is a monopoly. It is also not at all analogous to this situation and Tinder in general.
I'm no expert, but I don't think you understand what the 'network affect (sip)' is, as it does not apply to US Railways at all, and is a relatively new term that only arose in the 1970s. That aside, your example doesn't survive further scrutiny because railways were often the only practical way of moving between two generally public places — cities or towns. With Tinder though, they are providing you access to their own private network of users. Your example is like saying the monorail in disney is a monopoly, but that doesn't make any sense, since it's for transporting you within their own park.
Lastly, Tinder is not the one and only way to meet people. Yes, they have are of the most widely-used companies in the space. But there are others. And, you know, people can still meet in real life — through friends, at work, at activities or interest-based groups. On other social media like Twitter, et al.
