Our Releases are slightly longer because we have so much white space in between to create the flow, most of our stuff is about 9 pages.
Well we were playing around for our upcoming action comic we made an 18 page scroll down and it felt nice, but I would say about 15 pages is the sweet spot giver or take.
That being said our 6 page post got a lot of love, and we only heard a "too short, want more" from the 3 pager we did last week well being essentially bedridden. I'd say 5-7 is the lowest, probably better to post 10ish when you put out your first few chapters.
Also, we do post weekly so I can't really comment on how bi-weekly or monthly releases would be received.
EP1 - 9 pgs
EP2 - 10 pgs
EP3 - 6 pgs
EP4 - 9 pgs
EP5 - 3 pgs
EP6 - 7 pgs (coming monday)