My subs journey has been long and torturous, haha.
I tend to do short-ish comics of about 50-70 pages, I've been doing that for four years or so. Unfortunately this means that I lose people along the way as I start a new comic. I started posting on Tapas a couple of years into comic-making, posting up two completed comics gradually over a few months and getting about 50 subs each on them.
Then I posted up some weird personal "about my life" style comics... and they got into Staff Picks, back when that was a thing. I got about 500 subs in a couple of days. I was delighted, but also heartbroken that it had happened on some little one-shots which frankly, i didn't like doing and which weren't my best work. I'm quite a private person and I'd decided that I didn't enjoy creating comics about my own life.
It was so tempting to keep making more, but I decided to stay true to my ART and keep creating my story comics, despite receiving fewer subs. Then when I posted my latest comic, Earth in a Pocket, it got into New and Noteworthy, although not on the front page of it. This resulting in about 200 new subs, so not as good as Staff Picks, but I felt happy that a comic I love ended up being featured somehow.
It's been slow going since then, though. Overall I had about 800 subs overall, on all my comics, and that's dropped to about 730 because that rate at which people have been unsubbing from my little one-shot personal comics is greater than the rate people have been subbing to my story comics.
I get two or three subs every update, about 10-12 a month.