Yes, R172, I honestly think they're the perfect business partners. Finn seems like the brain behind their channel, while Jack is mostly just in front of the camera, he's a natural at it too. Jack makes the videos, while Finn manages everything else.
And yeah, Sam and Louis seem to capitalize on them, but I mean.. who wouldn't? Let's face it, we all would. I would do too if I was Sam. But I do think they're generally friends though. They used to hang out a lot, and still do from time to time. And lets face it, both Sam and Louis have gotten more views because of the twins, so it worked.
And you know what.. I agree with you about the vlog titles etc, but I think it's because they know their fans look for the videos, because the twins never do vlogs, the fans want to see as much of them as possible. I think it's both, they capitalize on it, but at the same time, they just write it in the titles, because it will be easier for fans to find the correct videos. At the end of the day I'm just glad they're featured in other vlogs, since they don't do vlogs themselves (ugh), so I don't really mind tbh.
About your last paragraph, R172, I could seriously sit here for hours and rant about that, because I agree. I have been annoyed with the twins lately. It feels like they're sorta slacking off, and I feel like they sometimes don't put a lot of effort into their videos. Their last video was a huge disappointment. And when they say "sorry, technical difficulties", like fine, I get it. But why not do one later in the evening, or the day after, why wait two weeks to do it? It's just annoying. Idk.. some times I get the feeling that the fame has gotten to their heads a little, like they know how popular they are, and stuff. I still like them, don't get me wrong, but it still feels like something has changed. I feel like they cared more about their fans before, but now they seem a lot more distant, I guess it's natural, because they have gotten quite big, but like I said, still annoying. I miss the days of random broadcats, I miss the days when they hung out with other youtubers.
BTW, their new video at the link, I was disappointed. They made a five minute video from the Playlist Live event, and used a minimum amount of footage, when we saw them filming all the time in the vlogs of other youtubers. I'm just puzzled.