Since many here seem to have had bad experiences with novels/comics containing long text & dialogues & slow pacing, I just wanna chime in to say that it does work for certain story types, especially works meant to be informative, fact-base and/or philosophical. Or some cases of "ridiculous comedy".
Text blurb
If the work is mainly about professions/topics most people don't know, like gluteology (study of... butts, don't ask me) OR vets OR pro gaming, it would be weird to not expect any text blurbs at some point.
Even if the author adds tons of engaging illustrations, memorable characters, concise scripts, sprinkled drama romance mystery and so on, the info is still the series' main draw.
For those, I'm happy with blurbs as long as the info is relevant, well-presented and connects back to the main characters. But if a not-so-factual series suddenly becomes an infodump without warning, I'd consider dropping.
A successful example is Heart of a Companion. Episode 24 is mostly just 3 (more like 2) people discussing issues with pet adoption systems with a sprinkle of drama & comedy structured in scrolling format. It works for me.
I haven't read enough novels on Tapas to give a convincing example. If anyone knows a good one, do showcase them here.
Except for reference and case studies, I don't sub series that don't click with me after the first few eps. I casually check them out sometimes though, to see if they've improved. So can't say I dropped those series cuz I didn't really pick them up.
In cases where I unbookmark or drop series, it's mostly one of these things:
Obvious plot holes: especially in sci-fi, mystery & complex-ish fantasy.
Character regression: usually, bad post-romance development or character nerfing is the culprit.
Exaggerations inconsistent with world building: this disturbs me the most when sports and talent-based stories go supernatural, or the author just churns out nonsensical stats to impress readers. Like, jumping 2 meters high in a basketball match, or playing the piano at around 2000 BPM (the latter is a real example from a comic 
)
Fluctuation in art quality: I strongly prefer hiatuses (unintentional or not) to the authors taking "shortcuts" every now and then. Many say the average reader's only gonna stare at each panel for like 30 sec, and everyone has bad days, but if I consistently spot missing fingers, lazy line art/coloring, wrong eye color, stiff poses etc. in an ongoing work, it's very tempting to unsub.
Lack of planning for series: this kinda leads to one or more issues above, and is common after a series' big break as the author(s) are often under huge pressure, or long-running series.
