I've been studying this a lot myself lately too. I've mentioned it time and time again about the interactions ratio (which borders on relatability) and there are several big factors that come into play greatly to effect to warp stats and perceptive.
Interaction ratio based on comic type
A gag a day due to high relatability to multiple different readers has a WIDER demographic meaning it normally a ratio of 1:3 with a week of upload, so practically everyone who subbed it will interact by view, voting and possibly commenting eg "OMG I do that!"
Romance & slice of life, they tend to get 1:1 ratio, They even get a view at a minimum with a week of upload. That means almost everyone or subbed viewed in it in the first week, a fair few will comment or vote to balance the interact up to 1:1 for missed viewers.
Narrative long form has a ratio of 3:1, so for every 3 subs only 1 will view it in its first week (even a month!), only 10% of viewers will vote, and only 10% of voters will comment.
the difference here are due to HOW the comic engages with the audience, some are highly relatable that they cast a wide net and are easy to share and understand, while others require investment and time. each has its own way of growing and garnering an audience and continue to get exposure, some will get there faster, other will burn slowly.
Now a feature can help and hinder that.
A feature is grand! it brings tons of readers to your door! getting featured can be overwhelming, with joy and anxiety to proof oneself worthy. On an emotional scale, it's different for each. The wave of new subs is encouraging ... and bloody scary but that's not the point. It can raise your profile just a little, after all it's the COMIC that will keep people around AFTER the feature is gone.
But, and there's a but unfortunately. The downside to a feature is 'subscriber bloat' A lot of people will subscribe very quickly when the comic is featured, as a way of bookmarking, 'they'll read it later'. Or at times completely forget about it and never go back, maybe never come to the site again at all! This can throw those stats out the window. Because the growth wasn't organic and grew VERY fast, its hard to judge of whether the feature actually did bring in more readers or did it just raise the sub number? At times, long after the feature when some of the people who subbed it as a bookmark come back, read, then decide it not for them and unsub it again distorts the stats as the unsubbing can almost wipe out the comics post feature organic growth for that week. I mean I wouldn't say no to feature! Don't get me wrong, but be prepared for the stats to go crazy for the next quarter after, sometimes you just have to buckle up and take the rough with the smooth.
when it get to these levels ... its HARD to gauge the audience of a comic, there are so many factors at play! Some times, just going back to WHY you started and enjoying the work and those who enjoy it with you.