Yes, I try to be very selective about the groups I follow because it really does take a lot of my time, I set aside a few hours before bed every night just to keep up with everything but that's something I would do anyway because it helps me wind down so I can sleep.
I don't follow every group to the same extent though, there's just Twice, Itzy and Nmixx that I will watch exactly everything from down all the way to obscure advertisements and then there's another category of idols where I will watch most things but I might skim a few videos when I'm short on time or if the topic really doesn't interest me. Lastly there's a category of groups I'm interested in which I follow on YouTube/Instagram but since I don't have time for more deep diving I will only watch the occasional stand-out content and clips.
Some members like to do really long live streams and on those days I might only have time to watch that in a day but those are my favorites because it lets you see the human behind the idol a lot more, imo it's much more interesting than promotional content.
(Obviously none of these groups have 10+ members but since there are more than 10 people in total and 9 in Twice i'll throw my cents in)