I will say sub4sub culture on Tapas is different now. Back then people did actually come back to read your latest episode even if most might just be pretending to have interest in the story. But before the limitations placed on sub4sub, too many people commented, liked and sub on my first episode. Despite me not really participating in sub4sub threads. I clicked on every one of their user profile and they do that on every story they stumble upon. It's really annoying and disheartening, wish I could tell every one of them how I feel about their actions. It's not a nice gesture, it's a physical sign that my story isn't even worth reading and the best they could do "for me" is see the first episode at the very least. Like if you don't want to invest your time into my story, you can view the first couple of episodes, yes, but don't interact with it.
Yeah, sub4sub makes their numbers look good, but does their writing reflect those numbers? A lot of the times, no. I know numbers don't represent the quality, because some really good stories out there deserves way more recognition than they deserve. This is why sub4sub is not a good way to get seen if nobody is genuine.
You can still do sub4sub, there's just extra steps to that now which is how things should be. Know that the minute you self published, you basically sign up to operate like a business. And businesses can not operate without knowing where their specific customers are.