1) On average, how many views, likes, and comments do you get when you upload within the first 1-3 days?
I upload something everyday. I am running several comics and there's rarely a day I don't put out an update on at least one of them unless there's a specific reason (got sick, got busy, fell behind on buffer, etc)
Since I have multiple, an average for any of them is also hard to pinpoint.
I guess for the survey's sake I'll say I get around 20k views a day for the first 1-2 days after an update on Bloodroot, which is the comic I have that has the most stable stats. Subs gain is around 30-40 a day. Used to be way more but since Bloodroot is a mixed bag it's becoming hard to grow with it. Which is why multiple comics is a helpful method.
2) How serious are you when it comes to making Web comics or Web novels? Are you aspiring to actually become an artist or a writer or are you doing this stuff just for fun?
I pay my bills with my comics. I am useless for pretty much anything else so if my comics flop, I'm screwed.
3) What genre do you usually create comics or write stories for?
It's a broad range. Most commonly, though, my comics usually involve one or several of these: Paranormal, Psychological, Horror, BL, Erotica, Romance, Comedy
4) How do you usually find other comics or stories on Tapas? Word of mouth? Daily Snack? Premium, Popular, Trending or Fresh? Or even suggestions?
Most commonly I find them on the popular page, daily snack, tapas banners/ads, or in the freshly published premium section. Even moreso lately since they started bringing in more gay content (especially the more mature kind) in the premium section. However with this it has also been brought to my attention just how low the ad availability is now, so until it's improved there's no way I can read the things I wanna read.
I guess another thing I should mention here is that I am LGBT myself, and sticking to the first page or two of popular will keep me mentally safe from toxic creators most of the time. I have to take enough insults on the basis of being trans and gay so I would rather avoid content from people who make fun of/complain about our current rising visiblity.
I'm pretty quick to unsub from people I see displaying such behavior. Even if it isn't straight up attacking us, it's attempting to push us back behind closed doors so they don't have to see us by making smug remarks and making us seem annoying. I could go on forever about this but I would only make more enemies by doing so 
5) If you're a creator, how many subscribers do you have?
I have a bit over 40k on Tapas right now, in total.
6) Do you mainly use the Tapas mobile app or the Desktop site for reading comics and novels?
I use the app for reading and desktop for checking my stats and browsing for comics.
I don't know if I'm doing something wrong but I can't find the collected popular section on the app.
Not interested in fresh or trending because I want to avoid unneccessary frustrations and dysphoria.
7) How long have you been on this site, anyway?
Since 2014
8) How often do you like, and comment on other people's content? And on what kinds of content do you like and comment on? In fact, how often do you even consider commenting on stuff, anyway? (yeah, I know, I'm really stressing the comments here)
I like episodes whenever I remember to do so, and comment when I have something to say or if I like the creator. Or if I'm just in a good mood. Comics that I wind down with before bed I usually just tap like on.