uh.... I caught up on Homestuck.... when I caught up, 'Seer: Descend' was the most recent update, which was roughly 3,600 "pages" in. When I caught up on Cucumber Quest, it was around page 300 I think? I recently binged Demon House, which was 97 episodes (looks like most episodes are two pages, so that'd be close to 200 pages), and Sanity Circus was also about 200-some-odd in when I caught up.
It's very hard to get me to read a comic, but once I want to read it, I'm reading it.
I... kinda don't, to be honest! I can only stay invested in a few things at once, so I don't really work very hard to read new comics. If I want to read it, I'll read it. If there's something that a lot of people are recommending, it'll usually go into the unofficial "at some point when I'm feeling restless I'll take a look at this and see if it grabs me" list.
The biggest thing for me is, learning that there is something in this comic that I just need to see more of. A lot of times it's finding out that there's some character somewhere in this who is My Type Of Character or seeing a page that is 100% My Aesthetic and at that point I'll easily read the whole darn thing, as long as it can hold my interest once I've started. Which is why a lot of times when I'm checking out a long comic, I'll open somewhere randomly in the middle and see what's going on, because if I know there's something in the comic worth hanging in there for, I've proven I can read 3000 pages to get to it. I just have to have that interest.
This is also why I believe in being pretty loose about "spoiling" things after they've happened in my own comic. I want people who are reading to get a pure experience, but after it's happened for them, I won't hide it -- after all, that might be the thing that makes somebody else go "wait, that's in this comic? Okay now I gotta read it."