Unfortunately, I'm not sure that worked, Friedman. I'm curious about what this #LINKTO function is, so I decided to take a look.
When I visited "They Head to the Pub," I didn't notice a link in the body of the text. I saw one thread at the bottom to "The Two Girls." Incidentally, the two links you've posted (as of this writing, assuming this was merely a typo) point me to the same thread. Actually, the "They Head to the Pub" links me to a thread with the title "Yes."
Anyway, I tried this method myself. At the end of the text body, I typed "#LINKTO xxxxxx" (where "xxxxxx" refers to the number of the thread according to Manage Threads). After saving, the only change I noticed was large, bold text reading "#LINKTO xxxxxx". As an experiment for myself, I also enclosed it with quotation marks, but this just included the text verbatim, including quotes.
Am I right in assuming this method is meant to create a link from one thread to another that's already been written beforehand? So, hypothetically, you could write two branching threads, but the second branch ultimately leads back around to the first. I wonder how that would conflict with continuity issues of opportunity cost--where one branch relies on an assumption that the other branch was not taken. This might be confusing in more open-ended stories. I also wonder if this lets us link two separate stories together, perhaps as a sort of crossover.
Noticing the customization options for a story, these are sort of like variables. I wonder if it'd be possible to secretly modify these variables if they're hidden, and program customizable story threads that only appear if these variables have the correct text. Let's say the first branch leads to a special item like a plank that can be used as a bridge across a gap in a second branch. This makes things seem a lot more like an adventure game of sorts. Although interesting, that'd be extremely hard to keep track of, especially with collaborative authors, I think. There's probably a solution for that, though, such as letting the reader see certain variables, but just be unable to edit them.