Well... It's kinda complicated.
I think with Tapas, we're sort of in the same loop a lot of people get stuck in. You start a series and get your friends and family to make accounts ...that growth stagnates and if it wasn't enough activity to move the algorithm to get you on the front page... You come to forums and ask advice on gaining readers.
"Get active on the forums." is the actionable advice...so you post your link everywhere you can...and build a layer of other creators subscriptions.
So our reader comments here come mainly from those two groups. That creates a certain type of discourse.
Now at Webcomicsapp, we haven't made a big social media push to our friends and families loop over there yet. During the upspree period, all the readers we're getting are getting generated by their on site tools. We were Featured, we show up for longer periods in New comics and it's generating actual readers.
Readers comment on things differently than your Uncle does. Readers want to know about different things than a fellow creator would.
We're finding ourselves answering types of questions and having discussion more specific to the individual story arcs.