Thanks for reminding me of newgrounds. I post my stuff there when it is under the 11 image per project limit. I forgot about it this time.
I don't know what it is like for "Scouted" artist on newgrounds, but for regular accounts like mine, the traffic is very bad. We are talking about like maybe 18ish views in the first day, and 4 of that is probably just me checking on the metrics.
As for rule34, which site are you referring to? I look around and there is a .xxx, .booru and a .paheal.net? I took a look at .xxx and .booru they have different TOS, though a bit similar. The .xxx has a rule against normal comics(but 4koma is fine apparently), so does some of these big booru sites (like gelbooru).
Thanks for the suggestions. I am always looking for better place than twitter to post stuff lol. For now, itch.io continues to be the best reaching for over long period of time.